Arnold has swallowed the Magic School Bus! Now, instead of seeing an exhibit of the human body at a museum, the class is taking a look at Arnold's stomach, his intestines, his bloodstream, and more from the inside on this heart-stopping fieldtrip - one the reluctant Arnold would be happy to miss.

A special field trip on the magic school bus allows Ms. Frizzle's class to get a first hand look at major parts of the body and how they work.'