These parasympathetic neurons make the rectum contract and the internal anal sphincter relax.
这些副交感神经元可以使直肠收缩,并使肛门内括约肌松弛。
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| 词汇 | Internal anal sphincter |
| 分类 | 英语词汇 英语翻译词典 |
| 释义 |
Internal anal sphincter
原声例句
Osmosis-解剖与生理 These parasympathetic neurons make the rectum contract and the internal anal sphincter relax. 这些副交感神经元可以使直肠收缩,并使肛门内括约肌松弛。
英语百科
Internal anal sphincter![]() ![]() The internal anal sphincter, IAS, (or sphincter ani internus) is a muscular ring that surrounds about 2.5–4.0 cm of the anal canal; its inferior border is in contact with, but quite separate from, the external anal sphincter. It is about 5 mm thick, and is formed by an aggregation of the involuntary circular fibers of the rectum. Its lower border is about 6 mm from the orifice of the anus. |
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