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Muscles - Anatomy & Physiology (view source)
Revision as of 13:18, 21 July 2008
, 13:18, 21 July 2008→Skeletal Muscle
==Skeletal Muscle==
==Skeletal Muscle==
*Each muscle is composed of multiple '''fascicles''', each of which consists of a bundle of muscle fibers
*Muscle "fiber" means a single cell, which are multi-nucleate, and known as '''syncitia'''
*Within each fiber are groups of parallel, longitudinal myofibrils
**Myofibrils are arranged as '''sarcomeres''', bound by Z-discs
**Each sarcomere contains 2 separate groups of myofilaments:
***Thin filament, containing '''Actin''', located centrally
***Thick filament, containing '''Myosin''', originating from either side of each Z-disc
*Skeletal muscle includes muscles of:
*Skeletal muscle includes muscles of:
**Posture
**Posture
**Movement
**Movement
**Respiration
**Respiration
*Two basic types of skeletal myofibre:
*Two basic types of skeletal myofibre:
***High '''glycolytic''' activity
***High '''glycolytic''' activity
***Function - exercise
***Function - exercise
==Tendon==
==Tendon==