An individual nerve cell may be up to a metre long.
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The two main types of processes that arise from the neuron’s cell body are a single long part called the axon and many short, branched parts called dendrites.
The cells of the nervous tissue are called nerve cells or neurons.
The brain, spinal cord, and nerves are composed of nervous tissue.
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.
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.
The rhythmic contraction and relaxation of the heart are carried out by cardiac muscles.