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Muscular System Part 1

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Muscular System  Part 1 Powered By Docstoc
					                  Muscular System

         Three Types of Muscle Tissues

Skeletal Muscle                           Cardiac Muscle
   • usually                                 • wall of heart
   attached to                               • not under
                  Smooth Muscle
   bones                                     conscious
                    • walls of most
   • under                                   control
                    viscera, blood vessels,
   conscious                                 • striated
                    skin
   control          • not under conscious
   • striated       control
                    • not striated
    Structure of a Skeletal Muscle

Skeletal Muscle
   • organ of the muscular
   system
   • skeletal muscle tissue
   • nervous tissue
   • blood
   • connective tissues
   • fascia
   • tendon
   • aponeuroses
    Structure of a Skeletal Muscle


• epimysium
• perimysium
• fascicle
• endomysium

• muscle
• fascicles
• muscle fibers
• myofibrils
• thick and thin filaments
                Skeletal Muscle Fiber

• sarcolemma
• sacroplasm
• sarcoplasmic reticulum
• transverse tubule
• triad
    • cisterna of sarcoplasmic
    reticulum
    • transverse tubule
• myofibril
• actin filaments
• myosin filaments
• sarcomere
Structure of a Skeletal Muscle
           Sarcomere


• I band
• A band
• H zone
• Z line
• M line
                   Myofilaments
                           Thin Filaments
Thick Filaments
                               • composed of actin
    • composed of myosin
                               • associated with troponin
    • cross-bridges
                               and tropomyosin

				
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posted:12/11/2010
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