Arnold's Body is a recurring body that the class travels inside during field trips. It is visited in the episodes, "For Lunch", "Goes Cellular", and "I Spy with My Animal Eyes". It is also explored in in the book, The Magic School Bus Inside the Human Body, and the CD-ROM, Explores the Human Body.
The shrunken class enters Arnold's mouth and is swallowed into his digestive system. In For Lunch, they go as deep as his large intestine before being burped out of his stomach. In the book and the game, the class explores additional areas such as his lungs and brain.
Arnold is unaware of the field trip inside him, and only finds after being told by the class. In the show, he is tricked by Ms. Frizzle into staying behind for the day. In both the book and game, Arnold doesn't notice the class disappearing and wonders where they went.
Arnold's Digestive System[]
- Mouth (TMSB/RA location - ETHB level): The start of digestion. His tongue controls his sense of taste.
- (O)Esophagus (TMSB/RA location - ETHB level): Connects the mouth to the stomach
- Stomach (TMSB/RA location - ETHB level - book series location): Where hydrochloric acid breaks food (and partially The Magic School Bus in "For Lunch") down.
- Small Intestine (TMSB/RA location - ETHB level - book series location): Lined with villi, these help send nutrients to the bloodstream. They either get sucked into a villus (Inside the Human Body, "Goes Cellular") or travel to the large intestine ("For Lunch", Explores the Human Body)
- Large Intestine (TMSB/RA location - ETHB level): Its walls deprive the leftovers Arnold has eaten of water.
- Kidneys (game only): Keeps blood clean and urinates waste.
- Liver (game only): The location that maintains Arnold's blood sugar levels
Other Areas[]
- Heart (ETHB level - book) - regulates blood flow.
- Nose (ETHB level - book) - sneezed out the foreign Bus in The Magic School Bus Inside the Human Body.
- Brain (ETHB level - book)
- Skin (ETHB level/TMSB/RA location)
- Lungs (ETHB level)
- Spine (book only)
- Right eye (TMSB/RA only) - controls the sense of sight. Exclusive to the TV series.
Trivia[]
- With the exception of the mouth (which is red in color), the rest of the digestive system is not supposed to be café brown with burgundy stripes. As shown through an endoscope, the rest of his digestive system should be pink.
- In "For Lunch", Arnold can be seen in the (o)esophagus for a split second.
- A cameo of Arnold where he is not supposed to be is also seen in "Revving Up" and "Cracks a Yolk".
Visited[]
- The Magic School Bus (all appearances)
- Ms. Fiona Frizzle ("I Spy with My Animal Eyes")
- Professor Valerie Frizzle, PhD (Inside the Human Body, Explores the Human Body, "For Lunch", and "Goes Cellular")
- Liz (Explores the Human Body, "Goes Cellular", and "I Spy with My Animal Eyes")
- Arnold Perlstein ("For Lunch" only, error, cameo appearance in his (o)esophagus)
- Carlos Ramón
- Dorothy Ann Hudson
- Jyoti Kaur ("I Spy with My Animal Eyes" only)
- Keesha Franklin
- Phoebe Terese (Inside the Human Body, Explores the Human Body, "For Lunch", and "Goes Cellular" only)
- Ralphie Tennelli
- Tim Wright
- Wanda Li