Digestive & excretory systems / Gatchel, Bob

Explains how each part of the digestive system helps break down food so that it can be absorbed into the bloodstream, and what role each part of the excretory system plays in removing the body's waste; presents an experiment on digestive acids and enzymes; and includes a visit with a kidney specialist.

Examines the digestive system, explaining how food is broken down and absorbed into the bloodstream, and how the excretory system removes waste products and indigestible materials.