Why Do My Feet Fall Asleep?

Have you ever wondered why your feet tingle or "fall asleep" when you sit too long? This book explains what happens inside your body by introducing young readers to the human circulatory system. Readers will learn how blood flows through the body, why we sometimes feel that pins-and-needles sensation, and discover simple explanations for blood pressure, bruising, and shivering. The straightforward language makes these body systems easy for early readers to understand.