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Muscles: Video Short

Muscles: Full Show

Muscles: The Web Show

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Muscles ['mə-səls]
A body tissue producing movement; part of the body's muscular system.

You have about 650 muscles in your body. Muscles help you move, breathe, digest your food, and pump blood around your body. Some muscles you control. Others do their job without you even thinking about it. Muscles come in all shapes and sizes and are key to good health.

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