musculature

musculature - 10/27/2011 Muscle Structure 3 types of muscle...

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1 Muscular System Chapter 11 Muscle Structure • 3 types of muscle tissue Striated - contains alternating bands of actin & myosin • each fiber multinucleated; called a syncytium • functional contractile unit is a sarcomere • multiple syncytium work together as a motor unit Cardiac Muscle - similar to striated muscles but differs: • 1) uninucleated • 2) cells separated by intercalated disks • 3) can contract without nervous stimulation • 4) under the control of the autonomic nervous system Muscle Structure Smooth Muscle - uninucleated without striations • usually in sheet associated with organs • under autonomic nervous system control • Muscular System Categories • 1) Somatic musculature – striated muscle attached to skeletal system and body walls • 2) Visceral musculature – smooth muscle associated with major organ system. Also includes cardiac musculature and internal musculature of the eye. • 3)
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musculature - 10/27/2011 Muscle Structure 3 types of muscle...

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