Muscles: Our Muscular System, Paperback

Don't move a muscle--read all about themDid you know that...

• Without muscles you couldn't blink--or even breathe

• Nearly 700 muscles control your life.

• Big or small, a muscle is made up of just one cell.

• Exercise doesn't give you more muscles, but it strengthens the ones you have.

Discover how muscles make us move--and see what it really looks like under your skin.