In the Beginning, There Was Muscle …
November 5, 2008
(Later, unfortunately, came fat) Muscle is the powerhouse of the body. It has a very special characteristic: it contracts. Given stimulus by the central nervous system, muscle fibers shorten to about two-thirds of their original length. And because of the clever ways in which those fibers are positioned, humans can do amazing things: like run 4-minute miles, climb impossibly high mountains, and make quick recoveries when they trip over their own shadows in public. Muscles also protect your body...
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