Answer:
Some
of the action like moving our limbs, fingers, moving neck, etc, can be
controlled by our will. We can move these parts of our body, whenever we want to
but some actions of our body like contraction and relaxation of heart, blinking
of eye, etc. are not under our control. We cannot stop functioning of heart, when
we want to do so. (2)
The actions, which can be manipulated by our wish is known as voluntary
action. The muscle, which can perform voluntary action are voluntary muscle.
These muscles are also called as skeletal muscles or striated
muscles. These muscles are mostly attached to bones and help in body movement.
The cells of this tissue are long, cylindrical, un branched and multinucleate
(having many nuclei).
The actions, which is not under our control are known as
involuntary action. These actions are performed by smooth muscles or
involuntary muscles. The cells are long with pointed ends (spindle-shaped) and
uninucleate (single nucleus). (2)
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