The anal canal

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The anal canal is the terminal segment of the large intestine between the rectum and anus, located below the level of the pelvic diaphragm. It is located within the anal triangle of perineum, between the right and left ischioanal fossa. As the final functional segment of the bowel, it functions to regulate release of excrement by two muscular sphincter complexes. The aperture at the terminal portion of the anal canal is known as the anus. The anal canal is the terminal segment of the large intestine between the rectum and anus, located below the level of the pelvic diaphragm. It is located within the anal triangle of perineum, between the right and left ischioanal fossa. As the final functional segment of the bowel, it functions to regulate release of excrement by two muscular sphincter complexes. The aperture at the terminal portion of the anal canal is known as the anus.   anal canal, the terminal portion of the digestive tract, distinguished from the rectum because of the transition of its internal surface from a mucous membrane layer (endodermal) to one of skinlike tissue (ectodermal). The anal canal is the final segment of the gastrointestinal tract. It has an important role in defecation and maintaining faecal continence. In this article, we shall look at the anatomy of the anal canal its position, structure, relations and neurovascular supply. Author achudhan karunaharamoorthy reviewer dimitrios mytilinaios md, phd last reviewed may 07, 2020 the anal canal is the last part of the gastrointestinal tract. It is about 3 to 4 cm long and lies completely extraperitoneally. It begins at the anorectal junction distally from the perineal flexure and ends at the anus.   the anal canal is the area between the rectum and the anus, and is where the large intestine, and technically the digestive system, ends. 5 inches (4 cm) long and is surrounded by a sphincter, a muscle that controls the opening and closing of the canal. It is located in a position between the rectum and the anus, under the level of the pelvic diaphragm. It is situated in the anal triangle of the perineum, between the left and right ischioanal fossa. 1 it is the area between the anal verge and the junction of the stratified cuboidal and columnar epithelium (dentate line). 2 it is lined by squamous epithelium in the lower anal canal below which sebaceous glands and hair follicles arise but changes to stratified cuboidal and, finally, columnar epithelium of the rectum. Canal kah-nal a relatively narrow tubular passage or channel. Alcocks canal a tunnel formed by a splitting of the obturator fascia, which encloses the pudendal vessels and nerve. Anal canal the terminal portion of the alimentary canal, from the rectum to the anus.   after watching this video you will be able to define and describe the internal features of the anal canal pectinate line, anal columns, valves and sinuses.

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