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Muscles - Anatomy & Physiology (view source)

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==Skeletal Muscle==

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*Each muscle is composed of multiple '''fascicles''', each of which consists of a bundle of muscle fibers

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*Muscle "fiber" means a single cell, which are multi-nucleate, and known as '''syncitia'''

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*Within each fiber are groups of parallel, longitudinal myofibrils

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**Myofibrils are arranged as '''sarcomeres''', bound by Z-discs

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**Each sarcomere contains 2 separate groups of myofilaments:

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***Thin filament, containing '''Actin''', located centrally

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***Thick filament, containing '''Myosin''', originating from either side of each Z-disc

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*Skeletal muscle includes muscles of:

**Posture

**Movement

**Respiration

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*Two basic types of skeletal myofibre:

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***High '''glycolytic''' activity

***Function - exercise

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*Each muscle is composed of multiple '''fascicles'''

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**Each fascicle is composed of multiple polygonal '''myofibres'''

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==Tendon==

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