Did you know there are 206 bones in an adult skeleton? Readers will learn many interesting facts about bones, muscles, exoskeletons, movements--both human and animal--and much more in this guide to the essential abilities of our bodies. The numerous movements humans can make, including running, jumping, and swimming, are explained and compared to animals through fascinating diagrams and vibrant photographs. Readers will learn about elements of their science curriculum and much more as they read.