Smooth muscle cells are long with pointed ends (spindle-shaped) and uninucleate (having a single nucleus), and they are also called unstriated muscles because they lack striations.
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The rhythmic contraction and relaxation of the heart are carried out by cardiac muscles.
Smooth or involuntary muscles control movements like the movement of food in the alimentary canal and the contraction and relaxation of blood vessels.
The cells of skeletal muscle tissue are long, cylindrical, unbranched, and multinucleate (having many nuclei).
Skeletal muscles are called striated muscles because they show alternate light and dark bands or striations under the microscope when stained.