Muscle, Smooth |
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| Involuntary Muscle; Involuntary Muscles; Muscles, Involuntary; Muscles, Smooth; Smooth Muscle; Smooth Muscles | |
| Unstriated and unstriped muscle, one of the muscles of the internal organs, blood vessels, hair follicles, etc. Contractile elements are elongated, usually spindle-shaped cells with centrally located nuclei. Smooth muscle fibers are bound together into sheets or bundles by reticular fibers and frequently elastic nets are also abundant. (From Stedman, 25th ed) | |