The anus
The anus is part of the

Structure @(Model.HeadingTag)>
The area around the anus is called the anal region. It is made up of the anal canal and the perianal skin.
Anal canal @(Model.HeadingTag)>
The anal canal is a tube about 4 cm long. It connects the anus to the rectum, which is the holding area for stool. The junction between the rectum and anal canal is called the anorectal line.
The anal canal is surrounded by ring-like muscles called the anal sphincter (made up of the internal anal sphincter and the external anal sphincter). These muscles relax to let stool pass out of the body.
The anal canal is lined by a mucous membrane, which is a thin layer of moist tissue. It
contains gland cells that make mucus (a thick, slippery fluid). This mucus helps stool
move easily out of the body. The upper part of the anal canal contains folds of

Perianal skin @(Model.HeadingTag)>
The perianal skin is the skin around the anus. The perianal skin is made up of squamous cells and is similar to skin found anywhere else on the body.

Function @(Model.HeadingTag)>
The anus is the end of the