Food is the body's fuel—but what happens to each yummy mouthful from the moment you take a bite? The Stickmen unravel the long process of digestion carried out by your winding system of guts. Learn about your stomach and its army of acids, the chemical powerhouse in your liver, and your busy kidneys that keep you toxin-free. Find out how you get energy and heat from food and how your body gets rid of the stuff it doesn't need. Illustrations, diagrams, and text tell all about the mashing, squeezing, pushing, and filtering that happen along your digestive system.