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muscle tissue accounts for how much body weight
50%
Excitability
ability to respond to stimulus
Contractibility
shortening
Extensibility
can be stretched or extended
Elasticity
return to original length
which muscle attahes to bones
skeletal
skeletal voluntary or involuntary?
voluntary
skeletal
multinucleated, no intercalated discs
smooth muscles
short and spindle shaped, found in organ walls, lack striations and intercalated discs
cardiac muscles
short and branched, involuntary, single cells oer nucleus, striations and intercalated discs
functions of skeletal muscles
posture, nutrient reserve, protects entrances and exits
anatomy of skeletal muscles



Epimysium
around entire muscle

Perimysium
around each fasicle

Endomysium
around muscle fiber

Aponuerosis
broad tendon like sheet


Arrangement of Muscle Fiber


other anatomical structure


sarcomere





area where motor nueron innervates the sarcolemma
neuromuscular junction