involuntary muscle

Definitions of involuntary muscle

n a muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart)

smooth muscle
the smooth muscle forming the wall of the uterus
musculus sphincter ani internus
an internal ring of smooth muscle formed by circular fibers of the rectum
Type of:
muscle, musculus
one of the contractile organs of the body

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