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WEEK 5 - Muscle Introduction.pdf - INTRODUCTION TO MUSCLES...

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INTRODUCTION TO MUSCLESGeneral Myology
MUSCLE TISSUE
CHARACTERISTICS OF MUSCLE CELLSIRRITABILITY (“Electrical Excitability”)CONTRACTILITYEXTENSIBILITYELASTICITY
TYPES of MUSCLE TISSUE§SKELETAL:§SMOOTH:§CARDIAC:StriatedVoluntaryNon-striatedInvoluntaryVisceralStriatedSpecializedInvoluntary
Muscle Types
FASCIADense irregular connective tissueCompletely surrounds the muscleSurrounds groups of musclesSkeletal muscle found deep to itExtensions of the fascia = Epimysium
FASCIA
Muscle (General)ØWhole muscle is covered byEPIMYSIUMØWhole muscle = GROUP ofFASCICLESFascicle (Fasciculus) / Fascicles (Fasciculi)ØEach Fascicle is covered byPERIMYSIUMØEach Fascicle is made up of bundles ofMUSCLEFIBERSØEach muscle Fiber is covered byENDOMYSIUMØMuscle Fiber = Muscle Cell
Microscopic organization of skeletal muscleDeep to ENDOMYSIUM, muscle fiber is covered bySARCOLEMMAEach Myofibril is covered bySARCOPLASMICRETICULUM
MUSCLE FIBEREach muscle fiber is made up of bundles ofMYOFIBRILS

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Term
Fall
Professor
PARIS
Tags
fascicles

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