Lift-the-Flap How Your Body WorksA friendly first introduction to the astonishing human body. Lift the flaps to uncover the amazing inner workings of your very own body from your bones, blood, and brain to the bacteria in your belly button. Discover what happens when you eat, how your senses work, what your heart and lungs do, and lots more fascinating facts. With links to specially selected websites for activities and videos about the human body. Lift the Flap How Your Body Works