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TABLE 2.1 Three Types of Muscle Tissue
A. Smooth muscle
B. Cardiac muscle
C. Skeletal muscle
Appearance
Closely aligned, long, spindle-shaped cells with central nucleiNonstriated
Short, branching, generally uninucleate cells that interdigitate at intercalated discsStriated
Very long, cylindrical, multinucleate cellsStriated
Location
Walls of hollow organs and tubes
Walls of heart
Primarily attaches to bones and occasionally to skin
Function
Propels substances or objects through organs or tubes
Propels blood through blood vessels
Movement, posture, joint stability, shock absorption, facial expressions
Control
InvoluntaryAutomatic contractions
InvoluntaryAutomatic contractions
VoluntaryRequires nerve stimulation to contract