Muscle Histology MBBS Notes | EduRev

Created by: Prakash Kumar

MBBS : Muscle Histology MBBS Notes | EduRev

 Page 1


Muscle Histology
Page 2


Muscle Histology
Functions of muscle tissue Functions of muscle tissue
? Movement
? Maintenance of 
posture
? Joint stabilization
? Heat generation
Page 3


Muscle Histology
Functions of muscle tissue Functions of muscle tissue
? Movement
? Maintenance of 
posture
? Joint stabilization
? Heat generation
Special functional characteristics of muscle
? Contractility
? Only one action: to shorten
? Shortening generates pulling force
? Excitability
? Nerve fibers cause electrical impulse to travel
? Extensibility
? Stretch with contraction of an opposing 
muscle
? Elasticity
? Recoils passively after being stretched 
Page 4


Muscle Histology
Functions of muscle tissue Functions of muscle tissue
? Movement
? Maintenance of 
posture
? Joint stabilization
? Heat generation
Special functional characteristics of muscle
? Contractility
? Only one action: to shorten
? Shortening generates pulling force
? Excitability
? Nerve fibers cause electrical impulse to travel
? Extensibility
? Stretch with contraction of an opposing 
muscle
? Elasticity
? Recoils passively after being stretched 
Types of Muscle Tissue
? Skeletal muscle
? Cardiac muscle
? Smooth muscle
Page 5


Muscle Histology
Functions of muscle tissue Functions of muscle tissue
? Movement
? Maintenance of 
posture
? Joint stabilization
? Heat generation
Special functional characteristics of muscle
? Contractility
? Only one action: to shorten
? Shortening generates pulling force
? Excitability
? Nerve fibers cause electrical impulse to travel
? Extensibility
? Stretch with contraction of an opposing 
muscle
? Elasticity
? Recoils passively after being stretched 
Types of Muscle Tissue
? Skeletal muscle
? Cardiac muscle
? Smooth muscle
Types of Muscle Tissue
Skeletal
•Attach to and move skeleton
•40% of body weight
•Fibers = multinucleate cells (embryonic  cells fuse)
•Cells with obvious striations
•Contractions are voluntary
Cardiac: only in the wall of 
the heart
•Cells are striated
•Contractions are 
involuntary (not voluntary)
Smooth: walls of hollow organs
•Lack striations
•Contractions are involuntary (not voluntary)
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