Unit 6-Lecture 1.pptx - Unit 6-Muscular System Lecture...

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Unit 6-Muscular System Lecture 1-Structure of Muscular Tissue
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Movement Maintenance of posture Thermogenesis (production of heat) When muscles contract, they produce heat, which is used to maintain normal body temparature Functions of the Muscular System
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Three types of muscle in the body: Skeletal Muscle Cardiac Muscle Smooth Muscle Types of Muscles
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Moves the bones of the skeletal system Voluntary (under conscious control of the SNS Consists of multi-nucleated cells Straited Skeletal Muscle
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Involuntary (under control of the ANS) Forms the myocardium of the heart Striations Single nucleus, centrally located Cells form branching patterns with intercalated disks (low resistance area for fast propagation of AP) Cardiac Muscle
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Involuntary (under the control of the ANS) Single nucleus centrally located Form part of the walls of hollow viscera (stomach, intestines, blood vessels) Not striated (this is why it is called smooth muscle) Slower contraction than striated muscle Smooth Muscle
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