How Your Muscles Work

>> Saturday, November 8, 2008

Inside your muscles are tiny filaments made of myosin and actin. "Filament" means a little string, or thread, or strand.

When a nerve tells your muscle to contract, little grabbers on the myosin filaments pull the actin filaments between them. When this happens in thousands and millions of cells, it can produce a very powerful pulling force!

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