How Does Your Body Work Your Nervous System Joelle Riley a Lerner Publications Company Minneapolis
Chapter 1 THE CENTRAL SYSTEM Your body has many systems A system is a way of doing things Your body’s systems help it do the things it needs to do to stay alive Your body is like a complicated machine What are some of the things happening inside your body 4
Your muscles and bones help you move Your heart pumps blood through your body Your lungs bring in air And your stomach breaks down the food you eat But what keeps all these systems working Your body’s systems help you do things such as playing games 5
