involuntary muscle

1. 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) (synset 105468049)
   is a type of: muscle, musculus - one of the contractile organs of the body
   subtypes:

   • 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
   same as: smooth muscle

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