Physiology

Last spring, I volunteered in a third grade class that was learning about the digestive system. The teacher took advantage of a warm, sunny afternoon and took her restless students outside to make chalk outlines of their partners, and draw in as many different types of body systems as they could. Most students nailed the digestive and respiratory systems, while the circulatory systems on most outlines were wildly imaginative affairs, with great swirls and loops throughout the bodies.