ZOO3731_chptrs.10-12

ZOO3731_chptrs.10-12 - Overview of Muscle Tissue...

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Overview of Muscle Tissue Skeletal -Muscle fibers are the longest of muscle types;striations; voluntary;somatic movement;adaptable. Cardiac -Constitutes bulk of heart walls; striated;involuntary;pacemaker sets contractions. Smooth muscle -Found in walls of visceral organs, forces fluids/substances through internal body channels; nonstriated; involuntary.
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Muscle Functions Producing movement -Skeletal muscle is responsible for all somatic movements & manipulation;cardiac muscle courses blood through vessels;smooth muscle-peristaltic actions Maintaining posture -Continuously defying gravity via constant adjustments Stabilizing/strengthen joints Generation of heat -Skeletal muscle contractions responsible for heat production.
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Skeletal muscle functions Produce somatic movements Maintain body posture/position Reinforce soft tissue-anterior/posterior walls/pelvic floor Guard entrances/exits-orifices of alimentary/urinary tracts Regulation of body temperature-heat loss by muscle contractions
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Gross Anatomy of Skeletal Muscles Epimysium -dense CT surrounds entire muscle;blends with deep fascia. Perimysium and fascicles -fibrous CT surrounding bundles of fibers. Endomysium -sheath of CT surrounding muscle fiber. CT coverings contributes to muscle tissue elasticity
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Normal activity of skeletal muscle dependant on nerve/blood supply;each muscle is served by one nerve,artery & vein;nerves penetrate CT septa; each fiber supplied with nerve ending(myoneural junction). Muscle requires large amount of
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This note was uploaded on 12/31/2011 for the course ZOO 3731 taught by Professor Staff during the Fall '08 term at FIU.

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ZOO3731_chptrs.10-12 - Overview of Muscle Tissue...

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