The Sarcomere reference article from the English Wikipedia on 24-Jul-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Sarcomere

A sarcomere is the basic component of a striated muscle's myofibril. Sarcomeres are composed of myosin and actin. A muscle cell, from a bicep, may contain 100,000 sacromeres. The myofibril of smooth muscle is not arranged into sarcomeres.

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