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Muscles - Anatomy & Physiology (view source)
Revision as of 13:56, 21 July 2008
, 13:56, 21 July 2008→Skeletal Muscle
*Muscle "fiber" means a single cell, which are multi-nucleate, and known as '''syncitia'''
*Muscle "fiber" means a single cell, which are multi-nucleate, and known as '''syncitia'''
*Within each fiber are groups of parallel, longitudinal myofibrils
*Within each fiber are groups of parallel, longitudinal myofibrils
**Myofibrils are arranged as '''sarcomeres''', bound by Z-discs
**Myofibrils are arranged as '''sarcomeres''', bound by Z-discs, which are the functional unit of muscle contraction
**Each sarcomere contains 2 separate groups of myofilaments:
**Each sarcomere contains 2 separate groups of myofilaments:
***Thin filament, containing '''Actin''', located centrally
***Thin filament, containing '''Actin''', located centrally