
Muscles: Our Muscular System
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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.
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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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