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malfutka [58]
3 years ago
9

Contracts Slowly Striated Voluntary

Biology
1 answer:
JulsSmile [24]3 years ago
3 0

Student 1 Smooth Cardiac Skeletal Skeletal

Explanation:

Skeletal muscles are voluntary muscles which contract fast through the strong forces in between its fibers to facilitate the movements of hands, legs, and other bones in the body. The cross striations are due to actin and myosin arranged along the axis of the cell.

Cardiac muscles are involuntary muscles in the heart walls. The contractions are slow with the force being spread along its branched structure so as to facilitate controlled pumping of blood from the heart.  Cardiac muscles are partially striated and are branched since actin and myosin are arranged on the cell axis.  

Smooth muscles are are involuntary muscles found lining the blood vessels, viscera, skin etc. They aid in visceral content movements, changes the tone of blood vessels, airways according to their diameter. There are no striations because actin and myosin are arranged randomly. Their contractions are very slow due to weak forces.

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