Wiktionary
involuntary muscle
n. (context muscle English) Muscle that is not controlled by individual volition; cardiac muscle and smooth muscle.
WordNet
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) [syn: smooth muscle]
Wikipedia
Involuntary muscle
Involuntary muscle may refer to:
- Smooth muscle tissue
- Cardiac muscle
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