08_Muscle Tissue

08_Muscle Tissue - MUSCLE TISSUE Chapter 10 Properties of...

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MUSCLE TISSUE Chapter 10
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Properties of Muscle Tissue Excitability: responds to stimuli from neurons Contractility: is able to shorten Elasticity : can recoil after contraction Extensibility: capable of stretching during flexion of antagonist muscles
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Functions of Muscle Tissue Movement (works with skeletal system) Maintenance of posture Temperature regulation Storage and movement of materials Support abdominal organs Joint stabilization (muscle tone)
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Three Types of Muscle Tissue Skeletal Muscle Cardiac Muscle Smooth Muscle
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Found in myocardium of heart Fibers are “Y” shaped or branched Uninucleated (small percentage are binucleated) Striated Involuntary Intercalated Discs Auto-rhythmic Characteristics of Cardiac Muscle
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Found in the walls of visceral organs Fusiform shape (wide middle and tapered at each end) Uninucleate No striations Involuntary Fatigue resistant Characteristics of Smooth Muscle
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Characteristics of Skeletal Muscle Made of cylindrical muscle cells (myofibers) Multinucleate From fused myoblasts Striated Voluntary Contains myoglobin Oxygen binding pigment Innervated Neuromuscular junctions Vascular
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Myoblasts fuse to form a skeletal muscle fiber Myoblasts Satellite cell Satellite cell Muscle fiber
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08_Muscle Tissue - MUSCLE TISSUE Chapter 10 Properties of...

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