The opening of the rectum to the outside of the body.
The opening of the rectum located between the buttocks through which feces is excreted from the body.
Opening at the posterior end of the digestive tract.
The exit of the intestines, subject to various disorders, including atresia (lack of an opening) and stenosis (narrowing).
Circular, external opening of the rectum, controlled by the anal sphincter.
The opening at the lower end of the digestive system through which the feces, or stool, passes out of the body. About 1 to 2 inches long, the anus comprises two circular muscles. The internal anal sphincter muscle is a smooth, involuntary muscle; the external anal sphincter is a voluntary, striated muscle that can be relaxed at will to allow a bowel movement. The two muscles work together to open and close the anus.
The opening at the lower end of the alimentary canal, through which the feces are discharged. It opens out from the anal canal, below the rectum, and is guarded by two sphincters. The anus is closed except during defecation.
The opening at the lower end of the bowel. It is kept closed by two muscles, the external and internal sphincters. The latter is a muscular ring which extends about 25 mm (1 inch) up the bowel, is nearly 6 mm (¼ inch) thick, and is kept constantly contracted by the action of a nerve centre in the spinal cord. In disease of the spinal cord the muscle may be paralysed, resulting in inability to retain the motions or stools.
The outlet of the rectum lying in the fold between the buttocks.
The opening of the rectum to the outside of the body.
In the realm of anatomy, there exists a particular orifice situated at the terminus of the intestinal tract. It acts as an egress point for the expulsion of solid waste, commonly referred to as stool, as it bids farewell to the human body.
The anus is the terminal part of the alimentary tract responsible for the elimination of feces from the body. It serves as a continuation of the rectum, extending downward and backward through the pelvic floor.
The anal canal features an orifice that remains closed by the muscles of the anal sphincter except during defecation. The anal sphincter comprises two layers: the internal sphincter, which operates involuntarily, and the external sphincter, which can be voluntarily relaxed for defecation. Anorectal disorders encompass conditions such as anal cancer, as well as imperforate anus, where the anal opening fails to develop properly.
The lowermost or endmost opening of the digestive system, specifically referring to the far end of the large intestine.