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Question

Cardiac muscle is composed of:

A
Striated, branched and voluntary muscle fibres
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B
Unstriated (smooth) spindle shaped and voluntary muscle fibres
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C
Unstriated (smooth) spindle shaped and involuntary muscle fibres
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D
Striated, branched and involuntary muscle fibres
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Solution

The correct option is D Striated, branched and involuntary muscle fibres
Muscular tissue is a specialized tissue in animals which applies forces to different parts of the body by contraction. The muscular tissue is of three types:

Cardiac muscle has branching fibers. They are located in the walls of the heart, appear to have faint striation, and are under involuntary control.

Smooth muscle fibers are located in walls of hollow visceral organs, except the heart, appear spindle-shaped, and are also under involuntary control.

Skeletal muscle fibers occur in muscles which are attached to the skeleton. They are striated in appearance and are under voluntary control.

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