Author(s): Josephine Croser

Green Non-Fiction

About half of your weight comes from muscles. Find out about the different types of muscles that make your body work. What is a muscle? How and why do they change shape? There are muscles that you can control and muscles that you cannot control. Find out how they work together and why they can pull but they can't push. This book takes you deep inside your body to tell the inside story on muscles.