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[[quoteright:350:[[Film/FantasticVoyage http://static.tvtropes.org/pmwiki/pub/images/fantastic_voyage.jpg]]]]
[[caption-width-right:350:"What kind of bloody vessel is this?"]]
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->''"Fantastic idea for a movie. Terrible idea for a proctologist."''
-->-- '''The Twelfth Doctor''', ''Series/DoctorWho'', "Into the Dalek"

A plot that involves characters being shrunk to enter someone's body. Usually animated. Travel is often via submarine and scuba variants. Lighting is rarely a problem. Often has a [[TimedMission time limit parameter]], where either the person the characters go inside has a very short amount of time left to live, or the shrinking is temporary and the characters must accomplish their mission and get out before they kill the person by returning to normal size while inside of them. There will be at least one scene of just barely squeezing through some sphincter or valve [[SlowDoors as it closes]]. If there's a scene inside the stomach, expect to see random inedible objects scattered around for [[RuleOfFunny comedic effect]] (even if the character ''isn't'' an ExtremeOmnivore) and/or food that has been swallowed whole that would normally be too large (such as whole burgers or hot dogs). These items tend to make handy platforms for any body explorers lacking a submarine, since shrunken characters usually suffer instant death upon contact with stomach acid (either that or they are completely immune). Protagonists being menaced by SeekerWhiteBloodCells, MonstrousGerms and/or [[BigCreepyCrawlies giant tapeworms]] (well, giant to ''them'') is also common.

See also IncredibleShrinkingMan. If there are normal-size invaders inside a [[AttackOfThe50FootWhatever giant's body]], then you have been SwallowedWhole. Curiously, giant bodies tend to be [[BiggerOnTheInside filled with large open spaces for movement and even extended travel within]], even if one was swallowed.

Named for the granddaddy of them all, [[Film/FantasticVoyage a movie co-starring Raquel Welch]], which also spawned its own AnimatedAdaptation. An episode with this plot will usually contain some kind of direct homage to or parody of said film -- a favourite being the infamous ClothingDamage scene. Bizarrely, the titles of such episodes surprisingly often reference ''Literature/JourneyToTheCenterOfTheEarth'' instead, with the person's name or a noun that describes them in place of "the Earth".

Not to be confused with the {{funk}}arific song by Lakeside. Or Coolio's similarly titled 1994 hit song.

Compare and contast with JourneyToTheCenterOfTheMind, GhostInTheMachine, AnimateBodyParts and BrainWithAManualControl. If somebody's body just happens to be the {{Adventure Town|s}} ''this'' week, you're probably just flying in a WombLevel.



[[folder:Anime & Manga]]
* The ''Anime/{{Doraemon}}'' episode "Noby's Tough to Stomach" features Doraemon and Noby going inside Sue after she accidentally swallows an opal that was part of her mother's $50,000 dollar wedding ring while eating peanuts.
* In ''Anime/DragonBallZ'', during the fight versus Buu, Goku and Vegeta ([[FusionDance fused together]] as "Vegetto") get absorbed by Buu, and end up travelling through the villain's body so they can rescue their allies.
* ''Anime/GalaxyAngel'' has an episode where the team needs to enter Volcott's body because of some strange thing that make him change his body into several crazy stuff. Mint got haywire and it turns even crazier, which in the end result in Volcott turning into a baby.
* Due to some extremely trippy AppliedPhlebotinum, the final battle of the IL arc of ''Manga/GetBackers'' takes place inside the opponent's body. Thus, hitting Makubex (who was in there with them...) caused the whole landscape to warp and shake.
* ''Anime/{{Gintama}}'': The Tama Quest Arc which is also a parody of the ''VideoGame/DragonQuest'' game franchise.
* In the [[Manga/JoJosBizarreAdventureStardustCrusaders third part]] of ''Manga/JoJosBizarreAdventure'', when Steely Dan implants his microscopic Stand, [[TarotMotifs Lovers]], into Joseph's head, Polnareff and Kakyoin shrink their own Stands to the same size and enter Joseph's brain to battle Lovers.
* In episode 10 of the ''Manga/SgtFrog'' anime, Keroro's mouth becomes infested with microscopic, cavity-causing aliens, and a good chunk of the rest of the cast (including a robot duplicate of the sergeant mentally controlled by Keroro) shrinks down and enters his mouth to fight them off. [[spoiler:Turns out there's a [[HotAsHell devil-winged chick]] inside there. In the end, [[HereWeGoAgain it happens to Natsumi.]]]]
* In the ''LightNovel/KyouranKazokuNikki'' episode "The Correct Way to Nurse", Kyouka turns the family, sans Yuuka, into a microscopic virus-fighting squad and takes them inside Ouka's body to remove an artifact that they tried to use to cure his cold.
* In the ''VideoGame/ParappaTheRapper'' episode "Did You Say You Didn't Sleep?!", Parappa's friend PJ gets infected by a virus, which causes him to grow into [[AttackOfThe50FootWhatever a giant]] every time he eats. This causes Parappa and his friends to get absorbed into his body and get rid of the virus in order to turn him back to normal.
* The JosephLai MockBuster pseudoanime ''Animation/SpaceTransformers'' is about a mecha and its young pilots entering the body of a woman... who has a small galaxy inside her body.
* ''Anime/TimeBokan'' series ''Yattodetman'' does this in episode 37 where heroes and villains fight in the brain of a support character.
* The ''Anime/OsomatsuSan'' episode "We Caught A Cold" has each brother trade off taking care of the other five when they're all sick; when Jyushimatsu is the well one, he divides into a million microscopic clones of himself, which all invade the bodies of his brothers to fight the infections inside them. It works, but as a side effect, they all end up acting [[CloudCuckooLander like Jyushimatsu]] themselves.
* Done in an episode of ''Anime/KirbyRightBackAtYa'' where Kirby goes into King Dedede to cure a cold.
* ''Anime/WonderBeatScramble'' is a whole series about this. Aliens seek the Secret of All Life by invading human bodies, and the heroes battle them using the titular ship Wonder Beat.
* Discussed (but ultimately averted) in ''Manga/MissKobayashisDragonMaid''. Takiya suggests that Tohru could do this to cure Kobayashi's fever in chapter 42. Tohru shoots down the idea, saying that Kobayashi's body wouldn't be able to handle it.

[[folder:Comic Books]]
* Creator/DCComics:
** There was a comic, probably from DC's silver age, in which ComicBook/TheAtom (Ray Palmer) had to enter the body of a patient to fight an infection. (Given his powers, it would be somewhat surprising to learn that this is the only time that happened.) Then ''Superman'' had to get himself shrunk and go in after him when [[spoiler:the observers on the outside figured out that the microscopic creatures he was trying to get rid of were actually themselves fighting the infection rather than causing it]].
** There's a similar story in a Justice League comic (I think #41, before Tower Of Babel) where the whole JL get shrunk by The Atom and enter someone's body. They lose their powers for some reason and are imprisoned by a race of tiny aliens.
* In [[http://coa.inducks.org/s.php?c=I+TL+1916-B this Disney story,]] Gyro shrinks DonaldDuck (and a submarine) so he can go inside Uncle Scrooge and save his life.
* ComicBook/AntMan of ''ComicBook/TheAvengers'' got to do this when he had to get inside his teammate ComicBook/TheVision in order to fix a malfunction inside him, during ComicBook/TheKreeSkrullWar. It was done again, as a MythologyGag, in ''ComicBook/HeroesReborn''.
* He did it again in ''ComicBook/NewAvengers'' to retrieve a device on Luke Cage's heart, bringing Comicbook/DoctorStrange with him.
* In ''Comicbook/ActionComics #283'', the Silver Age ComicBook/{{Supergirl}}, when she was affected by three Red Kryptonite meteors, got shrunk to microscopic size, which she used to her advantage to take care of some infectious viruses that were inside Dick Malverne's adoptive father.
* In ''ComicBook/TheSimpsons'' comic, Mr. Burns has become ill from suppressing his need to burp for decades. To undo the blockage that built up in his system, Burns' scientists plan to drop a shrunken submersible into his body. Though the pod can be remote controlled, they still need a pilot in case of an emergency. Since even 'an anthropod will do' Homer is selected.
* In Archie's ''ComicBook/SonicTheHedgehog'' #33, Sonic must shrink down and enter Rotor's body to fight off robotic germs.
* In a later issue of ''ComicBook/ROMSpaceKnight'', Rom and Starshine reduce themselves by the use of Ant-Man's technology to submicroscopic size so they can enter the body of an ant and find a way to defeat a semi-mystical plague.
* ''ComicBook/{{Teenage Mutant Ninja Turtles|Mirage}}'':
** Volume 4 featured a variation similar to ''Futurama'''s: instead of shrinking down, the turtles sent millions of mentally-willed [=NanoTurtleBots=] into April O'Neil's body, which had been infected by millions of [=NanoBaxterBots=].
** Later they have a straight example, going into April's sister's body to fight off "alien cancer".
* In ABC Comics' ''ComicBook/TomStrong'', Tom and his gorilla sidekick Solomon have to shrink themselves to enter the body of the malfunctioning robot butler Pneuman (which is more complex than it sounds because Pneuman had originally been a Steampunk robot in the 1890's and had been upgraded continuously right into the 21st century, so his innards contained everything from gears to vacuum tubes to atomic reactors to nanites).
* The Annual issue of ''ComicBook/TransformersMoreThanMeetsTheEye'' opens with a group of Autobots led Rodimus entering Ultra Magnus to destroy a colony of lethal [[{{Nanotechnology}} nanocons]].
* An issue of ''[[ComicBook/XMen Wolverine and the X-Men]]'' had members of the X-Men shrink down and enter the body of Kitty Pryde to eliminate a Brood egg that had entered her system. Please note, that this is immediately after Hank just finished teaching a biology class on mutant genetics that took place in Toad's body with the same process.
* The tenth and final issue of the ''ComicBook/{{Madballs}}'' comic book published by Star Comics (a now defunct subsidiary of Creator/MarvelComics) had the Madballs Touchdown Terror, Bash Brain, and Fist Face enter the body of their arch-enemy Dr. Frankenbeans so that they could cure him of a virus.

[[folder:Films -- Live-Action]]
* ''Film/FantasticVoyage'', [[TropeNamer obviously]]. The scientist who perfected the technology [[SovietSuperScience in the USSR]] is wounded after [[DefectorFromCommieLand defecting]] and has a bloodclot that can't be operated on externally, so a team goes in on mini-submarine. They only have an hour because the only man who knows how to solve the time-limit problem is the comatose patient.
* ''Film/GodzillaMothraKingGhidorahGiantMonstersAllOutAttack'': Towards the end of the film, Godzilla has killed all three of the Guardian Monsters, and the future looks bleak for Japan. The Humans decide to launch a submarine to attack Godzilla with a missile which can drill through things, but Godzilla eats the submarine. The Captain has a HeroicBlueScreenOfDeath, but gets encouraged by the spirit of his daughter to adapt his plan. He fires the missile at Godzilla's throat from the inside, and escapes through the massive wound. Godzilla tries to fire his Atomic Breath, but it escapes through his throat instead, making the beast explode.
* The Movie ''Film/{{Innerspace}}'', but its less, "lets enter the body to find a problem", and more "lets find the tool that can allow me to exit before I run out of air."
* In a rare ''permanent'' case, the film ''Film/OsmosisJones'' and the cartoon series it spawned were about cells, germs and viruses living inside a human being as if they were citizens of a city.
* According to the trailer for the Australian documentary/film, ''Film/ThatSugarFilm'', presenter Damon Gameau shrinks down voluntarily, to go inside of actor Creator/BrentonThwaites's body and examine the effects that sugar has on the heart and liver. Also, in a metaphysical fashion, when a shrunken version of Gameau goes inside the head of a larger version of himself, to examine the effects that sugar has on the brain.

* In ''Literature/TheThirteenAndAHalfLivesOfCaptainBluebear'' the main character that gives the book its name must venture through a giant's brain in order to get to the other side of a mountain chain, as the giant has [[strike: died]] fallen asleep and its head is blocking the pass through the mountains.
* In ''Literature/AWindInTheDoor'', Meg Murry and several other characters shrink to microscopic size to enter Charles Wallace's mitochondria and save him from the [[ArtisticLicense rebellious farandolae]] destroying him from the inside.
* In the fifth novel in the ''Literature/YoungWizards'' series, ''Wizard's Dilemma'', Nita and Kit travel into the body of Nita's mother, though they do so in a [[MetaphysicalPlace metaphysical]] manner rather than by shrinking themselves, with her body's metaphysical representation taking on the appearance of New York City.
* ''Literature/{{Animorphs}}'': In "The Journey", several members of the team chase some really tiny aliens inside Marco's body with the help of a convenient shrink ray. This is made more complicated by the fact that Marco can shapeshift, and everyone is nearly crushed to death when he turns into a cockroach.
* ShowWithinAShow version: in ''Literature/DreamPark'', one of the park's many popular attractions is the Mr. Digestion roller coaster.
* Besides the film novelization that he wrote (which is in itself notable for being a movie tie-in that's still in print ''over forty years after the movie was in theaters''), Creator/IsaacAsimov wrote a SpiritualSequel novel in the 1980s called ''Fantastic Voyage II: Destination Brain''.
* In ''Literature/JourneyToTheWest'' (and by extension most adaptations thereof), Sun Wukong shrinks himself and enters Princess Iron Fan's body by hiding in her soup.
* In the first ''Literature/ThePaperMagician'' book, Ceony winds up shrunk down and traveling through [[spoiler:Thane's disembodied heart. As she travels, she phases back and forth between his ''physical'' heart and his ''metaphorical'' heart (desires, fears, etc.)]], making this an unusual hybrid with JourneyToTheCenterOfTheMind.
* The story "The Space Cow" inverts this; a normal-sized veterinarian enters a gigantic alien organism to attempt to diagnose its apparent illness. [[spoiler:The animal is perfectly healthy, it's just lethargic because [[BizarreAlienBiology its young are ready to leave its stomach]] and begin independent living.]]

[[folder:Live-Action TV]]
* In the cartoon segments of ''Series/TheAquabatsSuperShow'', the band shrinks down to infiltrate Jimmy the Robot's body in order to rid him of his parasites that make him malfunction.
* [[DiscussedTrope Joked with]] in the opening scene of the ''Series/{{Community}}'' episode ''Conventions of Space and Time'', when Troy explains to Britta that them dating might cause Abed to relapse into another meltdown, and have to resort to this trope to bring him back. [[spoiler:Abed already knew, but didn't say anything because he liked the donuts that Britta brought to their apartment.]]
* In ''Series/CosmosASpacetimeOdyssey'', Neil shrinks the Ship of the Imagination down to cellular level to fly into a brown bear's bloodstream, eventually traveling to the ovaries where he can explain how genetic mutations gave rise to polar bears.
* ''Series/DoctorWho'':
** In the [[Creator/{{TomBaker}} Fourth Doctor]] serial ''The Invisible Enemy'', miniaturized clones of the Doctor and Leela enter the Doctor's body to fight a virus. [[spoiler:They fail, but clone-Leela's dissolving corpse imbues the Doctor with immunity.]]
** In the [[Creator/{{PeterCapaldi}} Twelfth Doctor]] episode "Into the Dalek", the Doctor, along with Clara Oswald and some human soldiers enter the outer-shell of a malfunctioning Dalek called Rusty.
* ''Series/{{Farscape}}'' has an episode featuring a Budong, an animal so big that an entire colony of people could live in its corpse collecting the minerals produced in the stomach, with the obvious problems of gastric juices and other treats still in common.
* Spoofed in an episode of ''Series/FurTV'' when Lapeño, Mervin and Fat Edís [[IdenticalGrandson Identical Cousin]] enter Edís anus after he overgrows due to infected food.
* Another live-action example is an episode of ''Series/HomeboysInOuterSpace''.
* The premier episode of the series adaptation of ''Series/HoneyIShrunkTheKids'' did this ''accidentally'' when the family's fully submersible (just in case) minivan wound up inside Grandpa. They did some impromptu cholesterol removal with the laser windshield de-icer, prompting the mother to ask "[[ReedRichardsIsUseless Why aren't we richer?]]"
* ''Kroll Show'' has a particularly jarring version of this when Bobby Bottleservice, Peter Paparazzo, and Gian shrink down and enter Bobby's own body, in order to rid himself of his love for Farley.
* In one of the more clever ''Series/LostInSpace'' episodes, Will Robinson and Dr. Smith find a severely malfunctioning robot who has become a giant due to his problem. The two have to physically enter the robot's body to fix him. However, the major complication is that they know that the second they are successful, the robot's body would start shrinking to normal size and they would have only seconds to escape before they are crushed. Naturally, the pair escape just in time before it was too late.
* ''Series/TheMiddleman'' episode "The Clotharian Contamination Protocol" had Wendy go inside [[RidiculouslyHumanRobot Ida's]] body to stop nanobots from making her explode. The snarky subtitles [[LampshadeHanging referred to it as]] "Like ''Film/FantasticVoyage''. Or [[DieHardOnAnX Die Hard in an Android]]".
* There's an episode of ''Series/TheMightyBoosh'' called "Journey to the Centre of the Punk", when punk Vince is infected with a Jazz Virus, and Howard and Lester are shrunk in order to destroy it. This is probably the strangest one ''ever'', especially the antibodies singing a song with Howard while he's trying to convince them he's their friend.
* Disney's ''Series/MightyMed'' has an episode where an envious Kaz uses a shrinking ray on Oliver as revenge for "stealing" his crush. It just so happens that a superhero with metallic skin has fallen ill and, as his skin makes x-rays and injections impossible, the only way to find out what's wrong is to send Oliver inside him. It turns out to be the superhero's arch-enemy, who had shrunken himself down to destroy the hero from the inside.
* In the ''Series/MrYoung'' episode ''Mr. Heart'', Adam and Derby shrink down and enter Echo's body without her knowledge to fight a flu virus and allow her to go on a date with Adam that same day. Of course, they do have to find a way out again. When they do get out and return to normal size, Echo accidentally shrinks Adam, Derby, ''and'' herself. The three of them are accidentally swallowed by Slab, [[spoiler:who is seen entering the bathroom during the ending credits, remarking that his favourite stall is free]].
* ''Series/SabrinaTheTeenageWitch'':
** In "No One Knows Libby Like Sabrina Knows Libby", Sabrina enters Libby's brain.
** In a later episode, Sabrina went inside ''herself'' to make room in her heart for a new beau.
* ''Series/StarTrekDeepSpaceNine'' episode [[Recap/StarTrekDeepSpaceNineS06E14OneLittleShip "One Little Ship"]] played with this by having a space anomaly shrink down a runabout. While O'Brien and Bashir weren't inside a human body, they were on board the Defiant during an attack by the Dominion and many of the same issues applied. One key component of the shrinking plot was that the ship had been shrunken at the molecular level- this meant that the air outside the ship would've been fatal to them if they had tried to breathe it due to the size of the molecules.
* In an episode of ''Series/UltraSeven'' entitled "The Flower Where Evil Lies", an alien insect called Darii gets into the body of a young woman related to one of the Ultra Garrison's members. Ultra Seven miniaturises himself, and enters the girl's body so he can fight the insect and save her life.
* ''Series/UltramanEighty'' had two episodes where 80 did this. The first was "The Visitor from Space", where an old friend of 80 named Alma comes to Earth to study [[ThePowerOfHate negative energy]] with her snail-like Jakki. However, Jakki absorbs too much negative energy and goes rogue until it is accidentally consumed by a zoo elephant, transforming the elephant into the giant monster Zuruzlar and forcing 80 to shrink himself and go inside Zuruzlar to subdue Jakki. The second was "I'm a Monster, You Guys!", in which a boy named Tetsuo eats an alien seed on a dare and is turned into a child-sized monster by it (though he still acts and thinks like a kid). The climax sees 80 shrink down and go inside Tetsuo to defeat the space plant.
* An episode of ''Series/WeirdScience'' has Chett eating a map to a house party that Wyatt and Gary were invited to. Wyatt and Gary shrink down, along with Lisa, to go inside Chett to retrieve the map. HilarityEnsues.
* In ''Series/WizardsOfWaverlyPlace'' there's an episode where Mason, [[spoiler:Alex's ex boyfriend]] swallows Dean, [[spoiler:Alex's other ex boyfriend]].

* The song ''Samut and the Dragon'' (found in ''Peter Alsop and Bill Harley In the Hospital'') details a young boy with cancer who uses imagery to help his body heal. Every evening he dresses up like a knight and rides a white stallion into his own body, "by the bloody steaming rivers... through the mighty sinew forest, under tendon trees and bone," until finally he finds the cancer, a dragon, and uses his "healing sword" to strike it down, leaving his body to heal in peace. Of course, the dragon's always back by the next evening, but one hopes it's getting a little weaker.
* The music video for the song ''Special K'' by Music/{{Placebo}} acts as a kind of homage to the film ''Fantastic Voyage''. The music video takes place at an unspecified laboratory where the lead singer, Brian Molko, is shrunk and sent into the body of drummer Steve Hewitt, in order to locate and destroy a clot somewhere in his brain.

* The last episode of Season 2 of ''Music/MitchBenn's Crimes Against Music'' is called "Journey to the Centre of [[Music/{{Yes}} Rick Wakeman]]", and is about Mitch and his friends doing exactly that in an AffectionateParody of Wakeman's "Journey to the Centre of the Earth" ConceptAlbum, because it's the only way to stop war between England and Wales. Or something.
* In Series Three of ''Radio/OldHarrysGame'', Satan and the Professor take a journey into Scumspawn's brain, discovering it to be a wide empty space, containing only tumbleweed and lumbering demon-thoughts. The title of this episode does somewhat reference the TropeNamer- 'The Reasonably Fantastic Journey'.

[[folder:Theme Parks]]
* Ride/DisneyThemeParks:
** EPCOT used to have a simulator ride called "Body Wars" based on this plot until 2007, when they closed down the entire pavilion that used to host it. It followed the travels of Dr. Cynthia Lair (played by Creator/ElisabethShue) as she studies how white blood cells react to a splinter.
** There was also a half-FantasticVoyagePlot, half-JourneyToTheCenterOfTheMind attraction in the same pavilion, called "Ride/CraniumCommand."
** Preceding both of them is the former Disneyland ride [[http://en.wikipedia.org/wiki/Adventure_Thru_Inner_Space Adventure Thru Inner Space]].
* At the Ride/{{Futuroscope}}, the ''Virus Attack'' dynamic movie brings you inside a patient's body in a mission to kill the nasty virus.

[[folder:Video Games]]
* There is a level in ''Franchise/DevilMayCry 3'' which takes place in Leviathan's body. Leviathan isn't big enough to hold all of that space, but his in-game profile says that his body serves as a gateway to the "jealousy hell" (in a nice ShoutOut to Leviathan's traditional role as the patron demon of envy).
* The Doom user mod DTS:T featured a level like this with the player wandering inside a human body- although to keep the level playable, the anatomy was incredibly bizarre.
* In one of the missions in ''VideoGame/EliteBeatAgents'', the EBA enter a track star's body in order to encourage his immune system (anthropomorphized as a nurse) in its battle against a rather nasty virus. And in the [[VideoGame/OsuTatakaeOuendan original Japanese game]], the Ouendan squad helps antibodies fight off what appears to be food poisoning in a musician.
* In ''VideoGame/FinalFantasyXIV'', players have to exploit this trope during the fight against Cerberus in the World of Darkness. Anyone who stands in Cerberus' sticky drool will end up chomped and instantly killed; however, if they let the Gastric Juices hit them with the Mini debuff first, they'll be swallowed whole instead and get a chance to punch the daylights out of Cerberus' stomach lining, causing the beast to collapse and leaving him vulnerable.
* The text adventure game version of ''VideoGame/TheHitchhikersGuideToTheGalaxy'' included a sequence where Arthur would find himself exploring his own brain.
* ''VideoGame/LaMulana'': [[spoiler: The Ruins of La-Mulana are the Mother's body, and the true form of the final dungeon is a hybrid ruin/WombLevel]]
* Done twice in ''VideoGame/{{Okami}}''. First, a shrunken Amaterasu has to enter the Emperor's body, through his mouth, to stop whatever it is that is making him exhale a noxious gas. A much longer trip involves a full-sized Ammy leaping down the gullet of the Water Dragon and exploring its innards, [[spoiler: causing such wounds in the process that the Dragon dies from internal bleeding]].
* The UsefulNotes/ZXSpectrum game ''[[SerialNumbersFiledOff Blood And Guts]]'', in which a miniaturised character must collect bits of a submarine and reconstruct it in the brain in order to escape through the eye, all the while using a laser to fight infections, random white blood cells to clear growths, and collecting red blood cells for oxygen. Eventually Quicksilva decided to abandon all pretense and re-released the game as ''Fantastic Voyage''.
* The plot of ''VideoGame/MarioAndLuigiBowsersInsideStory'' has the brothers working with Bowser after the latter ended up sucking them up inside of him.
* In ''VideoGame/MoshiMonsters'', the "20,000 Leauges Under the Fur" mission has Elder Furi be rendered sick and the monsters must shrink themselves and go into his body to remove Glumps that [[ItMakesSenseInContext are in there.]]
* ''VideoGame/GearsOfWar2'' has Delta Squad swallowed whole by a [[spoiler:giant riftworm that's been sinking human cities]]. Marcus and the gang have to kill it from the inside out using ''freaking chainsaws.''
* Bodyworks Voyager was an educational game from 1994 that was set TwentyMinutesInTheFuture and involved a crack team of commando-doctors trained to pilot fighter ships that were shrunk and injected into a patient's body, where your task was to shoot germs. Considering this came out years before VideoGame/TraumaCenter, some of the bugs were just damn HARD.
* The FullMotionVideo game ''VideoGame/{{Microcosm}}'' was a space shoot-'em-up with this plot.
* Midgame in ''VideoGame/FinalFantasyII'' you are swallowed by Leviathan and must fight your way out of him.
* ''Rex Ronan: Experimental Surgeon'', an anti-smoking EdutainmentGame for the SNES, had the title character shrinking himself to enter the body of a dying smoker to eradicate tobacco-induced ailments and MechaMooks sent by the evil tobacco company.
* ''VideoGame/{{Gradius}}'' spinoff ''[[GaidenGame Salamander]]'' was retooled in the arcade as ''Life Force'', set inside a [[PlanetEater planet-devouring]] EldritchAbomination named Zelos.
* ''VideoGame/KingdomHeartsI'' has a Monstro WombLevel, which has more anatomical detail than the [[Disney/{{Pinocchio}} film it's based on]].
* For some unknowable reason (wanting to make good use of the textures?) ''VideoGame/BreathOfFireII'' is in love with this setting: over the course of the game, Ryu journeys inside a whale (to kill the monsters nesting inside of it and wake it up), a tree (to cure its senility), and an overweight queen (to exterminate the calorie demons inside her organs.)
* The UsefulNotes/{{Intellivision}} game ''Micro Surgeon'' had this as its plot.
* In ''VideoGame/SaGa2'', the party must travel inside Kai in order to fight off micronized soldiers of Ashura and extract the Magi from Kai. [[spoiler:While this saves her life, it also means that she can't heal you afterwards since the Magi granted her healing powers.]]
* The last part of ''VideoGame/SpaceQuestVI'' involves series hero Roger Wilco being sent into the body of his friend/love interest Stellar, to save her from being killed/possessed by nanites. Although Roger has a shrunken shuttlecraft for part of the voyage, much of the action takes place on foot; many of the puzzles involve figuring out how to navigate through Stellar's labyrinthian innards. Among other things, he uses digestive juices to break open a medicine capsule, carries out an improvised balloon angioplasty (using alveoli) to clear a path through a blocked glandular duct, rides a tapeworm through the small intestine to avoid being digested, and jabs her brain with a paper clip to trigger a debris-dislodging cough.
* Amiga game ''VideoGame/{{Vaxine}}'' had you fighting diseases within different organs of the body, only the playing field was an infinite chessboard and the diseases were represented by bouncing balls.
* ''VideoGame/SuperMarioWorld2YoshisIsland'' has a boss fight which features this trope: you're shrunk down to bite-size by Kamek and have to fight your way out of Prince Froggy's stomach.
* In Irem's shooter ''X Multiply'', the spaceship X-002 gets miniaturised and injected into a space colonist's body to defeat an alien virus. You even get to see the X-002 coming out of the tip of a syringe at the very beginning of the game.
* The 1983 Apple II game ''VideoGame/{{Microbe}}''. A miniaturized submarine and crew are injected into a patient's leg vein. They must proceed through various organs and blood vessels to the brain, where they will fix the patient's problem. Certain organs provide specific benefits: the submarine can refuel in the liver and get more air in the lungs.
* ''VideoGame/RatchetAndClankSizeMatters'' has a level where Ratchet must travel inside Clank in order to reboot him after he is attacked by Technomites.

[[folder:Web Animation]]
* Seppuku's episode in the World of the Damned storyline of ''WebAnimation/BananaNanaNinja'' has him [[IncredibleShrinkingMan shrinking down]] and swimming through his opponent's intestines and bloodstream.

[[folder:Web Comics]]
* ''Webcomic/AwfulHospital'': "Endoshifts" let people enter worlds derived from bodies,[[note]]both those of others, and even their own[[/note]] shaped by the concepts they encountered during their lives. In the Inert Sub-Concept Vessel arc, Fern inadvertently [[http://www.bogleech.com/awfulhospital/228.html stumbles into]] a zone spawned from the corpse of one of her alternate selves. It's also used [[http://www.bogleech.com/awfulhospital/321.html as a diagnostic tool.]]
* Done in ''Webcomics/TheNonAdventuresOfWonderella'' [[http://nonadventures.com/2007/12/15/tumor-has-it/ here.]]
* Done in ''Webcomics/WorkSucks'' [[http://www.worksuckscomic.com/comicarchive.php?page=176 here.]] When your boss won't see a doctor, the only logical solution is to shrink down and let him swallow you to help remove parasite causing it.

[[folder:Web Original]]
* The ''WebVideo/TheAnnoyingOrange'' episode "Fruit-tastic Voyage" sees Orange and the other fruits traveling inside Nerville in order to remove a laser that had been implanted in his brain by broccoli aliens.
* In the ''WebVideo/SuperMarioLogan'' episode, "Jeffy Gets Stung By a Bee!", Mario and Brooklyn T. Guy believe that Jeffy swallowed the rare Banana Butterfly, which, when digested, causes the victim's arms to fall off and the victim to turn into a banana, so they shrink themselves down to microscopic size and pilot a microscopic submarine to get the butterfly out of Jeffy's stomach. When it turns out that Jeffy swallowed a bee, they are angry at Jeffy for making them waste their time on him. [[spoiler:Then it turns out that Jeffy really did swallow a banana butterfly along with the bee.]]

[[folder:Western Animation]]
* In one episode of ''WesternAnimation/TheAdventuresOfJimmyNeutron'' Jimmy and Sheen go inside Carl's body in order to get DNA so that Jimmy can make a cure to an illness. Of course, there is then the trouble of how you get out... But they soon decide that they should make Carl sneeze them out.
* An episoe of ''WesternAnimation/AlfTales'' taking advantage of the Literature/LittleRedRidingHood story has Alf traveling inside the wolf's body.
* The episode of ''WesternAnimation/AlvinAndTheChipmunks'', "Inner Dave", where the boys are accidentally shrunk by one of Simon's inventions. They end up going inside Dave's head in order to try telling him what happened.
* ''WesternAnimation/AquaTeenHungerForce'', "Unremarkable Voyage": After Meatwad swallows an experimental computer chip, Frylock shrinks himself to go in and get it. Thanks to a few screw ups, both he and a miniaturized Carl eventually wind up inside Master Shake. They then have to beat their way out of Shake's eye, killing him in the process. [[NegativeContinuity No worries though.]]
* ''WesternAnimation/{{Archer}}'' episode "Drastic Voyage" had the group use the shrinking technology to remove a blood clot from the man who invented the shrinkray. [[spoiler: Unfortunately, Krieger interfered with the procedure, causing them to be injected into the man's foot, rather than his neck. It's about the first example when they fail, returning to their size while still in the man's head, killing him instantly.]]
* ''WesternAnimation/{{Arthur}}'': Doesn't really happen, but in "Buster's Breathless", [[CloudCuckooLander Buster]] [[BigEater Baxter]] tries to explain his asthma by telling his classmates to ''imagine'' themselves inside his lungs.
* The ''WesternAnimation/BatmanTheBraveAndTheBold'' episode "Journey to the Center of the Bat!", starring Aquaman, the Atom, and the cutest lymphocyte EVER.
* In one episode of the ''WesternAnimation/{{Beetlejuice}}'' cartoon, BJ got a bad case of EasyAmnesia after being hit by a falling satellite, and a psychiatrist shrinks himself, Lydia, and a duplicate of Beetlejuice so they can enter the original BJ's body, work their way to the brain, and fix the problem.
* ''WesternAnimation/BillAndTedsExcellentAdventures'': Bill and Ted go inside their Gym teacher's body. They even befriend the pretty female AnthropomorphicPersonifications of his lungs. MakesSenseInContext.
* ''WesternAnimation/CampLakebottom'': A miniaturized [=McGee=] ends up inside Buttsquat in "Buttastic Voyage".
* This also forms the plot of a ''WesternAnimation/CaptainNTheGameMaster'' episode, in which all the heroes other than Captain N shrink down to enter his body to help him fight off a disease.
* On ''WesternAnimation/CaptainPlanetAndThePlaneteers'', the shrunken Planeteers battle microbes from polluted water inside Kwame after he accidentally drinks them.
* In an episode of ''WesternAnimation/CatDog'', Cat goes inside his and Dog's own body after Cat eats Dog's pet fish. Very, very confusing if you haven't seen it.
* Multiple episodes of ''WesternAnimation/TheCatInTheHatKnowsALotAboutThat'' have the Cat take Sally and Nick on a tour of someone's body in a shrunken Thingamajigger to learn about various body parts, such as the stomach, the heart, the nose, etc.
* The titular character of ''WesternAnimation/{{Chowder}}'' once ate a really sour fruit that made his lips pucker so tight that he created a portal that sucks himself into his own mouth. He then had to get rid of the pieces of fruit in his mouth, led by "Lord Souron", with sweets and a musical number to get back.
* ''WesternAnimation/CodenameKidsNextDoor'' has "Operation S.P.R.O.U.T," in which Numbuh Four accidentally eats a Brussels sprout, and Numbuhs One, Two and Five shrink themselves to retrieve it.
* There is an episode of ''WesternAnimation/CowAndChicken'' called Journey to the Center of Cow where Chicken was accidentally swallowed by Cow. This is a rare example of when some one was not shrunk.
* ''WesternAnimation/DangerMouse'' has an episode where DM and Penfold use Baron Greenback's shrink ray to follow the villain inside Colonel K. to defeat the toad's terrible plot.
* ''WesternAnimation/DexHamiltonAlienEntomologist'' has an episode where the crew have to travel into the body of sick SpaceWhale in order to cure it.
* ''WesternAnimation/DextersLaboratory'' where he goes inside Dee Dee's body to combat a cold she's having. He ends up in the dog instead.
* ''WesternAnimation/TheFairlyOddparents'': "Tiny Timmy" - Timmy shrinks down to microscopic size to do a biology report and ends up inside Vicky.
* ''WesternAnimation/FamilyGuy'': Stewie shrinks himself and enters Peter's body to prevent his parents from reproducing. Apparently all sperm are their potential human counterparts flying around in fighter jets. Stewie also meets a comrade in sperm form who shares the same sadistic tendencies as Stewie. He actually gets born in a later episode after Peter donates sperm.
* ''WesternAnimation/{{Futurama}}'':
** In "Parasites Lost", although with a twist: Zoidberg and co. are sending miniature robot replicas of themselves inside Fry. Gives Leela (well, a miniature thereof) the opportunity to slice and dice them up without any long-term ramifications. Farnsworth's scientific explanation as to why they don't shrink themselves:
--> '''Prof. Farnsworth:''' That would require extremely tiny atoms, and have you priced those lately? I'm not made of money! Leave me alone!
** The "tiny robots" method also allows for an unusual take on the trope - later in the same episode, Fry creates his own tiny robot, thus effectively allowing him to go inside ''his own body'' (though this was earlier done on ''Doctor Who'', with clones instead of robots -- see above example).
* In one episode of ''WesternAnimation/{{Gawayn}}'', Gwendolyn and Roderick have to travel inside the body of a dragon to kill the germ causing its acid reflux.
* ''WesternAnimation/GodzillaTheSeries'' had Nick and Monique venture inside Godzilla Jr / [[FanNickname Toonzilla]]. For obvious reasons, shrinking wasn't required.
* In one episode of ''[[WebVideo/TheAnnoyingOrange The High Fructose Adventures of Annoying Orange]]'', Orange and the other fruits are shrunk down and sent inside Nerville on a minituarized fruit cart to remove a laser that has been implanted in his brain by the broccoli aliens. ItMakesJustAsMuchSenseInContext.
* ''WesternAnimation/InvaderZim'' miniaturized himself and his spaceship to go invade Dib's brain after Dib manages to get proof of Zim's alienness in the episode "Nanozim".
** Dib then swallowed a nanobot and had Gaz remote control it, eventually leading to [[spoiler: Dib's robot and Zims robot fighting near Dib's brain.]]
* An episode of the '90s ''WesternAnimation/IronMan'' cartoon does this; Hawkeye's spine is injured in a fight, and Tony has a technological fix but no way to safely insert it. So naturally he goes for hand-delivery. This is further complicated when a similarly-shrunken Ultimo tags along.
--> "You're giving him a heart attack!"\\
(Tony is trapped in a ventricle) "Yeah, and it's me it's attacking!"
* A light example in ''WesternAnimation/JackieChanAdventures'' when Jackie and Hak Foo are shrunk to near microscopic sizes and end up inside Tohru's head who perceives their voices as [[Main/HearingVoices voices in his head]]. Luckily, Tohru sneezes them out before they return to size inside his head.
* The ''WesternAnimation/LiloAndStitchTheSeries'' episode "Poxy", where they must chase after an experiment of microscopic size that is inside Pleakley's body.
* Several WesternAnimation/LooneyTunes shorts inverted this, by sending WesternAnimation/BugsBunny or another character running over and through the body of a giant as if it were a building (including pulling shades down over the giant's window-eyes). These no doubt influenced ''WesternAnimation/TheRenAndStimpyShow'' version below.
* ''Literature/TheMagicSchoolBus'' once took a tour through the human body in one of the books that spawned the TV series, and then ''seven'' times in the TV series: Arnold was the "victim" in the book and the show's adaptation of it ("For Lunch"), with him accidentally ingesting the shrunken bus while eating a snack (which was later adapted into a computer game), while Ralphie and Ms. Frizzle had their turns as well, to investigate the body's immunity system ("Inside Ralphie"), and muscular systems ("Works Out") respectively. Then they wound up going inside Arnold ''again'' to figure out what had made his skin turn orange ("Goes Cellular"). Later on, Arnold's cousin Janet gets her turn when the class goes inside her nose to study smell ("Makes a Stink"). In "Gets Eaten", they go inside a tuna fish, and in "Cracks a Yolk", they go inside a chicken (and [[AccidentalInnuendo get laid]]).
* The ''WesternAnimation/MegaBabies'' episode, ''Inner Ear Inferno'' involves Meg and Buck being shrunk and travailing inside Derrick in order to find the cause of his ear infection.
* One episode of the ''WesternAnimation/{{Mickey Mouse|2013}}'' series of 2013-'14 is called "[[Recap/MickeyMouseS2E5DownTheHatch Down the Hatch]]", in which WesternAnimation/MickeyMouse and WesternAnimation/{{Goofy}} are accidentally miniaturized by a ShrinkRay and then are inadvertently swallowed by WesternAnimation/DonaldDuck. They explore his body [[spoiler:, but when he learns they are in there, the duck tries all he can to get them out. In the end, as the shrinking effects wear off, Mickey and Goofy emerge from Donald by way of [[WhaleEgg a giant egg]], [[ArtisticLicenseBiology laid by Donald, a]] ''[[ArtisticLicenseBiology male]]'' [[ArtisticLicenseBiology duck!]]]]
* In the "Mundane Voyage" episode of Ralph Bakshi's ''WesternAnimation/MightyMouseTheNewAdventures'', Mighty Mouse is miniaturized and sent into the President's body.
* Done in ''WesternAnimation/MonaTheVampire'', in the episode "The Sam n' Ella Infiltration", to enter the body of someone who is sick.
* A episode of ''WesternAnimation/MuppetBabies'' had Kermit, Piggy, Gonzo and Skeeter use their imaginations to shrink down to germ-size and give Scooter's bumbling immune system a hand when he catches a cold.
* ''WesternAnimation/TheNewAdventuresOfHuckleberryFinn'' has an episode "The Mission of Captain Mordecai" where the three main characters, Huck Finn, Tom Sawyer and Becky Thatcher get swallowed by a giant whale while trying to escape a mad Ahab-like sea-captain who was trying to force them to be his new crew in his mission to kill said whale. To make matters worse, the giant whale also swallows the captain when he falls overboard while trying to harpoon it, and the rest of the episode deals with the young trio trying to evade the murderous captain while endeavoring to find a way out of the beast, which they finally do by climbing out its blowhole, the whale helping them along by blowing them out.
* In the ''WesternAnimation/OggyAndTheCockroaches'' episode "Globulopolis", while Dee Dee is swimming in a cup of yogurt, Oggy drinks it up, and Dee Dee along with it. Dee Dee then travels around the insides of Oggy and discovers [[GhostInTheMachine white tiny ghost-clones]], repeatedly punches Oggy's bladder as if it was a punching bag, and makes his stomach rumble by eating consumed fish inside it. [[spoiler:In the end when he gets out, he ends up in Oggy's nose and flies into Jack's mouth along with Joey and Marky]].
* In the ''WesternAnimation/PennZeroPartTimeHero'' episode "Totally Into Your Body" Boone and Sasha were teleported into a sick Penn's body.
* ''WesternAnimation/PhineasAndFerb'': On the episode "Journey to the Center of Candace", When Isabella's dog Pinky eats her sash, the boys try to go inside and retrieve it, but [[ExactlyWhatItSaysOnTheTin are accidentally eaten by Candace]].
* ''WesternAnimation/PinkyAndTheBrain'' did this in order to foil an intelligibly-enhanced cat's DanceSensation plot from being carried out properly by a band, by shrinking themselves and letting themselves get ingested by one of the band members. Unfortunately for them, they get eaten by the completely wrong guy, but they made the best of the situation by having the guy stand in for them.
** Done also in the comic book, in which they attempted to enter the President's brain, but ended up inside the First Dog.
* ''WesternAnimation/QuackPack'' had an episode where a germ-loving scientist invades Donald's body, with Huey, Louie and Dewey being shrunk and sent inside their uncle in order to stop him.
* ''WesternAnimation/TheRealGhostbusters'''s Episode "Mean Green Teen Machine" has Egon giving a conference inside a human vein (as part of a DreamSequence).
* ''WesternAnimation/ReBoot'', "The Great Brain Robbery": Megabyte miniaturizes a mercenary named Mouse and his flunkies Hack and Slash and sends them to probe secrets from Bob's brain. Except they accidentally end up in Enzo's body instead, and Bob goes in after them.
* In the ''WesternAnimation/{{Regular Show}}'' episode ''Cool Cubed'', Thomas drinks a slushie which gives him extreme brain-freeze, and Mordecai and Rigby are sent into his body to thaw his brain out. His brain looks like a frozen wasteland.
* Inverted on a later episode of ''WesternAnimation/TheRenAndStimpyShow'' called "Blazing Entrails"; a boy genius inflates Stimpy's body with a bicycle pump to ridiculous proportions, so that Ren can enter his body and find out why Stimpy is acting even stupider than usual.
* ''WesternAnimation/RexTheRunt'', "Holiday in Vince": The dogs voyage into Vince's brain in a shrunken submarine in an attempt to cure his Random Pavarotti Disease (he frequently blurts out short bursts of opera). Eventually they find his tuning knob and retune him to Radio 4 (so he now blurts out gardening tips and the shipping forecast instead).
* ''WesternAnimation/RickAndMorty'', "Anatomy Park": A Christmas episode about Rick sending Morty into a homeless man's body. Bonus points for being a simultaneous send-up of ''Franchise/JurassicPark'', with the episode's plot revolving around the eponymous microscopic amusement-park inside of the hobo and the subsequent escape of the viruses held within. Bonus {{Squick}} is added by the hobo dying very early into the adventure, leading to a Fantastic Voyage inside the man's decomposing corpse.
* ''WesternAnimation/{{Rugrats}}'', "The Inside Story": Tommy and co. go inside Chuckie to retrieve a watermelon seed, though in keeping with the relatively mundane setting, it's AllJustADream (and once Chuckie wakes up from it he expels the seed with a burp anyway).
* In a tongue-in-cheek episode, ''WesternAnimation/SamuraiJack'' once had to enter an ailing dragon's body to cure its devastating flatulance.
* ''WesternAnimation/{{Sealab 2021}}'', "Craptastic Voyage": When Captain Shanks refuses to get treatment for a brain tumor because of his religion (a thinly-disguised parody of Christian Science), Stormy, Quinn, and Debbie Dupree shrink themselves to microscopic size and travel through Shanks' body to deal with it themselves. Subverted in that the episode's mostly ''Franchise/StarWars'' parodies, not ''Film/FantasticVoyage''.
* In the 2nd season finale of ''WesternAnimation/TheSecretSaturdays'', the first final battle between [[spoiler:Zak and Argost takes place inside the body of the super cryptid [[strike: Kur]] fake Kur.]]
* The plot of one of ''WesternAnimation/TheSimpsons'' Halloween short, where the Simpsons travel into Mr Burn's body. Marge references LatexSpaceSuit when she asks why her suit is so flatteringly cut. Homer replies, "But Marge, that's what turns a [[PungeonMaster Mediocre Voyage]] into a Fantastic Voyage!" (A reference to Raquel Welch in the movie.)
* ''WesternAnimation/SouthPark'' did a twisted parody of this trope, in which a gerbil named Lemminwinks had to find his way out of Mr. Slave's ass. And then it happened again with ''Paris Hilton''.
* ''WesternAnimation/SpongeBobSquarePants'': [=SpongeBob=] and Patrick once entered Squidward's body in order to remove a clarinet reed stuck in his throat. They also screw around with his brain. Unfortunately, after completing the task, Patrick accidentally made them re-enlarge while still inside Squidward. While he didn't burst, he did swell up big time from having a full grown submarine inside of him.
* Used in an episode of ''WesternAnimation/TeenTitans'' where Beast Boy turns into a bacterium to fight a computer virus that has taken over Cyborg.
* Used in ''WesternAnimation/TeenTitansGo'', where Cyborg gets sick again and Robin, who always wanted to do this trope, shrinks himself and the team with a shrink ray he bought ''just for this purpose'' and goes into Cyborg. [[RealityEnsues Reality]] and much {{Squick}} ensues, however, when the show [[DeconstructedTrope deconstructs]] this trope and Robin experiences how gross the human body really is and leaves without curing Cyborg, disappointed.
* On an episode of ''WesternAnimation/TinyToonAdventures'', Buster, Babs, and Calamity shrink to enter Plucky's head and examine his brain to watch his fantasies.
* ''WesternAnimation/TotallySpies'': Sam, Alex, and Clover shrink down to the size of microbes to fight a trio of villains inside Jerry's brain.
* ''Franchise/{{Transformers}}'':
** In the finale of ''WesternAnimation/TransformersReturnOfConvoy'', the Battlestars are swallowed by Star Giant and have to fight their way out from within.
** ''WesternAnimation/TheTransformers'' has the episode "Microbots," which features Bumblebee, Perceptor, and Brawn shrinking down to enter Megatron and remove a power-enhancing crystal.
** ''WesternAnimation/TransformersRescueBots'' also has an episode in which Kade accidentally ingests some microscopic cleaning bots (Scrubmites), prompting the Rescue Bots to be shrunk down and retrieve them from his body.
* One of the many sketches from ''WesternAnimation/TwoDTV'' sees Tony Blair in hospital suffering from an unknown heart condition. The NHS wants to send a shrunken team of scientists into his body to resolve the problem, but John Prescott steps on them. So John Prescott, David Blunkett (and his guide dog), Jack Straw and Tony's wife Cherie Blair are sent. [[spoiler: Turns out that Gordon Brown is the one causing Tony's heart problems, in his latest attempt to become Prime Minister.]]
* In an episode of ''WesternAnimation/UltimateSpiderMan'', Spider-Man and Ant Man must shrink down into Fury's body that has been infected with Doc Ock's nano-bots.
* ''WesternAnimation/UncleGrandpa'' once shrunk himself and Pizza Steve to get inside a kid's brain and make him better at video games.
* {{Invoked|Trope}}, {{discussed|Trope}}, and lampshaded in ''WesternAnimation/TheVentureBrothers'' episode "The Diving Bell vs. the Butter Glider". For some reason, Doctor Venture is paralyzed, and they can't use an MRI because there's too much metal in his body, so the logical solution from Billy Quizboy is to get a submarine, shrink it down, and go inside to find the problem. Which turns out to be [[spoiler:a clot in Doc's bloodstream caused by a previous shrunken submarine piloted by previous clones of Hank and Dean, whose skeletons are still there]]. The implication is that Billy was quick to suggest this solution because of what a sci-fi geek he is. He name-drops Film/FantasticVoyage as a "classic" and defends the quality of Film/InnerSpace, though his assistant dismisses the premise an old cliché.
* In Creator/SabanEntertainment's ''The Why Why Family'', most of the episode segments with [[PunnyName Micro and Scopo]] Why Why, baby Victor's uncles, involve going with Victor into his family's bodies via [[IncredibleShrinkingMan shrinking themselves]]. This is also justified because Micro and Scopo are experts on the human body and nutrition.
* In an early part-animated, part-live action ''ABC Series/AfterSchoolSpecial'', [[http://www.imdb.com/title/tt0322745/ "The Incredible Indelible Magical Physical Mystery Trip,"]] a magical being named Timer (who would later appear on ABC's Saturday Morning cartoon block in a series of PSA spots) shrinks two children and takes them on a tour of their uncle's body to better understand the importance of health and physical fitness. A sequel, [[http://www.imdb.com/title/tt0305786/?ref_=fn_al_tt_4 "The Magical Mystery Trip Through Little Red's Head"]] has Timer take two different kids on a tour of their teenage sister's brain to explain how the human mind works, 41 years before ''Film/InsideOut''.
* ''WesternAnimation/WackyRaces2017'' has an episode where Dick Dastardly shrinks the other racers to microscopic size in order to win a race that's supposed to take place in an equally tiny race track. He does win by default until it's discovered that the other racers have been accidentally swallowed by Dastardly after winding up in the food he was eating. As a result, the race actually ends in a tie.
* ''WesternAnimation/YinYangYo'': In the episode "Voyage To The Center Of The Yo", Yuck shrinks himself down into Master Yo's body so that he can steal the Toilet Brush of Illumination when the latter retrieves it from the Safety Deposit Box Dimension; Yin and Yang have to shrink themselves down in the battle cruiser and enter Master Yo's body in order to stop Yuck.