Muscle Tissue Types

Skeletal
Attached to bones
Nuclei multiple and peripherally located
Striated, Voluntary and involuntary (reflexes)
Smooth
Walls of hollow organs, blood vessels, eye, glands, skin
Single nucleus centrally located
Not striated, involuntary, gap junctions in visceral smoothCardiac
Heart
Single nucleus centrally located
Striations, involuntary, intercalated disksMuscle fibers or cells
Develop from myoblasts
Numbers remain constant

Muscular System Functions And Properties

•Body movement
•Maintenance of posture
•Respiration
•Production of body heat
•Communication
•Constriction of organs and vessels
•Heart beat

Properties Of Muscle :
•Contractility
–Ability of a muscle to shorten with force
•Excitability
–Capacity of muscle to respond to a stimulus
•Extensibility
–Muscle can be stretched to its normal resting length and beyond to a limited degree
•Elasticity
–Ability of muscle to recoil to original resting length after stretched