Ordinarily, the rectum is empty because stool is stored higher in the descending colon. Eventually, the descending colon becomes full, and stool passes into the rectum, causing an urge to move the bowels. It can remove the solid waste.
The rectum is a muscular ring that is at the end of the large intestine. Its function is to keep the intestine sealed shut until the need to pass feces arises. When that need arises it assists in the...
Its main function is as a passage which fecal matter passes through, its secondary function is as a passage into which objects are inserted for sexual pleasure.