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The anus is the site of potential infections and other conditions, including cancer (see anal cancer). [4] With anal sex, the anus can play a role in sexuality. Attitudes toward anal sex vary, and it is illegal in some countries. [5] The anus is often considered a taboo part of the body, [5] and is known by many, usually vulgar, slang terms.
The anal verge refers to the distal end of the anal canal, a transitional zone between the epithelium of the anal canal and the perianal skin. It should not be confused with the pectinate line between the upper and lower zones within the anal canal. The anal gland secretes lymphal discharge and built-up fecal matter from the colon lining.
Changed arrow for Anal canal, according to Paul Gobée, anatomist. 17:22, 7 February 2021: 348 × 212 (837 KB) Jmarchn: Fixed arrow problem (Anal canal). 17:18, 7 February 2021: 348 × 212 (837 KB) Jmarchn: Changed label for Anal canal, according to Paul Gobée, anatomist. 09:39, 5 November 2020: 348 × 212 (877 KB) Jmarchn: Added list to make ...
The anal glands or anal sacs are small glands near the anus in many mammals. [1] ... Diagram showing anal canal, with dentate line, along which anal crypts open. Anal ...
The internal anal sphincter, IAS, or sphincter ani internus is a ring of smooth muscle that surrounds about 2.5–4.0 cm of the anal canal.It is about 5 mm thick, and is formed by an aggregation of the smooth (involuntary) circular muscle fibers of the rectum.
The anal triangle can be defined either by its vertices or its sides. Vertices. one vertex at the coccyx bone; the two ischial tuberosities of the pelvic bone; Sides. perineal membrane (posterior border of perineal membrane forms anterior border of anal triangle) the two sacrotuberous ligaments
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Stylized diagram showing action of the puborectalis sling, and the formation of the anorectal angle. A-puborectalis, B-rectum, C-level of anorectal ring and anorectal angle, D-anal canal, E-anal verge, F-representation of internal and external anal sphincters, G-coccyx & sacrum, H-pubic symphysis, I-Ischium, J-pubic bone.