Cardiac muscles are involuntary. They operate automatically without conscious control, ensuring the heart’s continuous rhythmic contraction and relaxation necessary for pumping blood throughout life.
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Nervous tissue cells are highly specialized for being stimulated and then transmitting the stimulus very rapidly from one place to another within the body.
Heart muscle cells are cylindrical, branched, and uninucleate (having a single nucleus).
Smooth muscles are found in the iris of the eye, in ureters, and in the bronchi of the lungs.
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.