Describe two major types of smooth muscle.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Describe two major types of smooth muscle.

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Step 1

Smooth muscles are the body's involuntary muscles present in the walls of hollow organs, including the small intestine and large intestine and stomach.

Step 2

The two major types of smooth muscles are visceral and multiunit.

  • Visceral smooth muscles are the type of smooth muscles that comprise spindle-shaped cells associated with one another closely. It is found in the hollow organs like the intestines, urinary bladder and stomach. The fibres in these smooth muscles can stimulate each other, so stimulation in one fibre can cause stimulation of the whole muscle.
  • Multiunit suit muscles are disorganised and have separate muscle fibres. These muscles are present in the iris and blood vessels wall. These muscles contract when the gets stimulated by motor nerve impulses.
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