The anus is part of the digestive system. Stool leaves the body through the anus. It is the opening at the end of the large intestine after the rectum.
The anal canal is the terminal part of the large intestine. In humans it is approximately 2. It lies in the anal triangle of perineum in between the right and left ischioanal fossa.
The rectum is the concluding part of the large intestine that terminates in the anus. The average length of the human rectum may range between 10 and 15 cm. Its diameter can be compared to that of the sigmoid colon the part of the large intestine nearest the rectum at its onset.
The anus is an opening in the lower part of the digestive tract. When stool fills the rectum, the sphincter muscle relaxes, letting stool pass through the anus and out of the body. The external anal sphincter closes off the anus when stool has passed.
This information may also be useful to the friends, families, and caregivers of patients dealing with rectal prolapse. Treatment of this condition may often require surgery, and this patient education material is intended for patients with rectal prolapse who are considering or have been recommended surgery. It will address why surgery may have been recommended, what the various treatment options are, what it involves and how it may help patients.
Anal bleeding can be a sign of many different problems. Some causes can be serious, which is why it should be checked out by your doctor. Bright red blood may be seen only on toilet paper or in the toilet bowl after a bowel movement — not mixed freely with the bowel motion.
The anus is that part of the intestinal tract that passes through the muscular canal of the pelvis and anal sphincters. It is the final orifice through which stool passes out of the body. In adults, the anus is 4 to 5 centimeters long.
The rectum is the final straight portion of the large intestine in humans and some other mammalsand the gut in others. The adult human rectum is about 12 centimetres 4. It terminates at the level of the anorectal ring the level of the puborectalis sling or the dentate lineagain depending upon which definition is used.