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Voluntary muscles are the muscles that can be controlled consciously, and are made up of cylindrical fibres. Generally, these muscles are attached to bones of the skeleton, thus called the skeletal muscles. Skeletal muscles are striated and are made up of multinucleate cells.
Voluntary muscles are muscles that move because you decide to cause them to move. You also have involuntary muscles that move on their own without your thinking about it, and usually you are not able to influence their movement much. Voluntary muscles are muscles that move because you decide to cause them to move.