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- DictionarySmooth mus·cle/smo͞oT͟H ˈməsəl/
noun
- 1. muscle tissue in which the contractile fibrils are not highly ordered, occurring in the gut and other internal organs and not under voluntary control.
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- Smooth muscle
Involuntary non-striated muscle
Smooth (soft) muscle is an involuntary non-striated muscle, so-called because it has no sarcomeres and therefore no striations (bands or stripes). It is divided into two subgroups, single-unit and multiunit smooth muscle. Within single-unit muscle, the whole bundle or sheet of smooth muscle cells contracts as a syncytium. Smooth muscle is found in the walls of hollow organs, including the stomach,... Wikipedia
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