| 单词 | musculus sphincter ani internus |
| 释义 | musculus sphincter ani internus (extremely rare) n WORD FAMILY musculus sphincter ani internus n an internal ring of smooth muscle formed by circular fibers of the rectum Hyper involuntary muscle, smooth muscle 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) |
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