Function of anal canal
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It serves to lubricate and transmit fecal matter as it passes from the rectum to outside the body. It helps regulate defecation and maintain continence (voluntary control over fecal discharge). Author achudhan karunaharamoorthy reviewer dimitrios mytilinaios md, phd last reviewed june 30, 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. 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). 5 inches) in length its diameter is narrower than that of the rectum to which it connects. 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. 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. The external anal sphincter muscle is the voluntary muscle that surrounds and adheres to the anus at the lower margin of the anal canal. This muscle is in a state of tonic contraction, but during defecation, it relaxes to allow the release of feces. Its made of the muscles that line your pelvis (pelvic floor muscles) and two other muscles called anal sphincters (internal and external). The anal canal, thought of mostly as the final exit for what we ingest, is more intricate a structure than most would believe. 5 cm to 4 cm in length, it plays a vital role as a defense against organisms trying to make their way into the body, can differentiate between solid liquid and gas, and as a set of muscles that continence. The job of these ducts is to empty the secretions of anus glands into the lumen of the canal. The only known function of the anal glands is to produce small amounts of secretions, ranging in color from yellow brown to gray. It is thought that these secretions are used as a way to mark territory and identify the dog to other dogs.
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