Biology / Unit 12 Bio 2743 short lesson, about 20 seconds
Three Muscle Tissue Types
Captions available
The idea
Muscle tissue takes three forms: smooth muscle is involuntary and unstriated, skeletal muscle is voluntary and striated with many nuclei, and cardiac muscle is involuntary, striated, and single-nucleated.
In practice
Cardiac muscle cells link through intercalated discs that pass an electrical impulse quickly from cell to cell.
Where people slip
Cardiac muscle is not under conscious control even though it shares skeletal muscle's striated appearance.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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