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two characteristics of visceral muscle
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Visceral muscle cells are found in the organs, blood vessels, and bronchioles of the body to move substances throughout the body. Visceral muscles are also commonly known as smooth muscle due to their lack of striations. Four characteristics define smooth muscle tissue cells: they are involuntarily controlled, not striated, not branched, and singly nucleated.
The unconscious regions of the brain control visceral muscle through the autonomic and enteric nervous systems. Thus, visceral muscle is involuntarily controlled. This is evidenced by our inability to consciously control many physiological processes such as our blood pressure or digestion. Each visceral muscle cell is long and thin with a single central nucleus and many protein fibers. The protein fibers are arranged into strings called intermediate filaments and masses known as dense bodies. Intermediate filaments contract to pull the dense bodies together and contract the visceral muscle cell. Each visceral muscle cell is very weak, but working together these cells can produce powerful, long-lasting contractions. For example, many visceral muscle cells in the uterus are able to contract together to push a fetus out of the womb during childbirth.