Anal site

Posted by / 07-Feb-2016 15:13

The surgical anal canal is approximately 4 cm long and extends from the anal verge or intersphincteric groove distally to the anorectal ring, proximally.The anatomic anal canal is only approximately 2 cm long and extends from the anal verge distally to the dentate line proximally.

The external anal sphincter is striated muscle that forms a circular tube around the anal canal.Proximally, it merges with the puborectalis and the levator ani to form a single complex.For patient education resources, see the Digestive Disorders Center, as well as Anal Abscess, Rectal Pain, and Rectal Bleeding.These two terms are often used interchangeably, even though they do not mean the same thing.The dentate line is the junction of the ectoderm and endoderm in the anal canal.

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The anal verge is an anocutaneous line approximately 2 cm distal to the dentate line.

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