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Product Description
Don't move a muscle--read all about them! Did 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.
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