Jisho

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Noun
1. smooth muscleAnatomy, See also 横紋筋
Wikipedia definition
2. Smooth muscle tissueSmooth muscle is an involuntary non-striated muscle. It is divided into two sub-groups; the single-unit (unitary) and multiunit smooth muscle. Within single-unit smooth muscle tissues, the autonomic nervous system innervates a single cell within a sheet or bundle and the action potential is propagated by gap junctions to neighboring cells such that the whole bundle or sheet contracts as a syncytium (i.e. , a multinucleate mass of cytoplasm that is not separated into cells).
Read “Smooth muscle tissue” on English Wikipedia
Read “平滑筋” on Japanese Wikipedia
Read “Smooth muscle tissue” on DBpedia

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