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单词 smooth muscle
释义

WordReference Random House Unabridged Dictionary of American English © 2024
smooth muscle, [Anat.]
  1. Anatomyinvoluntary muscle tissue in the walls of viscera and blood vessels, consisting of nonstriated, spindle-shaped cells.
  • 1885–90

Collins Concise English Dictionary © HarperCollins Publishers::
smooth muscle n
  1. muscle that is capable of slow rhythmic involuntary contractions: occurs in the walls of the blood vessels, alimentary canal, etc
Etymology: so called because there is no cross-banding on the muscle
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