How many of our body systems are the same as those of animals? What nutrients are important for living things to function well? In this approachable book, readers get to answer these questions! Including sections on the skeletal system, muscular system, the digestive system and more, this book supports elementary curricula and encourages readers to find out more. Diagrams aid visual learners with the main content. Activities and questions engage young scientists with themselves and the world around them.