Book excerpt: Discover the amazing human body, system by system and layer by layer, and the incredible things it is capable of with Inside Out Human Body. Comes with a real, 3-D model to help you learn faster! What do you think is the most amazing machine in the universe? A superconductor? The modern computer? A rocket ship? Think again: It’s the human body! Astonishingly intricate and complex, your body grows, heals itself, and performs a mind-boggling number of complex functions all at the same time! Inside Out: Human Body takes you on an incredible journey through the powerful muscular system, the "bone zone," the long and windy road of the digestive system, the blood-pumping circulatory system, the forty-seven-mile long nervous system, and beyond! A unique layered model of the human body serves as the center point of each section, revealing key body parts and functions, while entertaining and informative text explains how the body works. Each section is fully illustrated with colorful diagrams and includes fun, interactive lessons for you to try yourself. You can learn how to take your own pulse, how to make your arms float, and even what the color of your urine means! Sometimes the most incredible wonders are right under our noses.