involuntary muscle(redirected from Involuntary muscles)
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Muscle that is not controlled by individual volition, including smooth muscle and cardiac muscle.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||involuntary muscle - 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)|
myometrium - 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
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