Anal sinuses

The anal sinuses (rectal sinuses) are furrows in the anal canal, that separate the anal columns from one another. The anal sinuses end below in small valve-like folds, termed anal valves.

单词	Sinus anales
释义	Sinus anales 英语百科 Anal sinuses The anal sinuses (rectal sinuses) are furrows in the anal canal, that separate the anal columns from one another. The anal sinuses end below in small valve-like folds, termed anal valves.
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Sinus anales

Anal sinuses