这次Frizzle老师和孩子们要学习关于人体的知识哦！魔术校车已经被阿诺德吞下了肚子！不是去博物馆看人体展览，而是从这个实际的场景中去参观阿诺德的胃，肠子，血液和更多的身体器官 - 不情愿的阿诺德应该会很高兴错过了这次参观。

Talk about a change of plans! Ms. Frizzle and her class are on the Magic School Bus headed for a museum. They have been studying how the body turns food into energy, and now they are going to see an exhibit on the human body. Things seem fine until they stop for lunch. A strange mishap causes the bus to shrink and then be swallowed! Ms. Frizzle's class is suddenly inside a real human body.