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 lower half of the anal canal has sensitive nerve endings.
Factors identifying higher risk rectal bleeding in general practice
Anal Disorders - Harvard Health
Many Americans have difficulty moving their bowels. Many things contribute to this problem, including diet and activity level. Other causes are unknown. The large bowel consists of the colon 5 feet long and the rectum 8 inches long. Many times the rectum is referred to as the opening where stool emerges, but that is actually the anus. The rectum is just upstream from the anus, and the large bowel is connected to the small bowel. The colon's main function is to process the 3 pints of liquid stool it receives each day into a manageable amount of solid stool, ready for elimination.
Rectal Bleeding in Adults
Professional Reference articles are designed for health professionals to use. You may find the Rectal Bleeding Blood in Stool article more useful, or one of our other health articles. NICE has issued rapid update guidelines in relation to many of these.
Rectal bleeding is a common symptom. The ability to distinguish those patients having serious underlying pathology from those with self-limiting conditions is a continuing dilemma in general practice. To determine the factors affecting the predictive and diagnostic value of rectal bleeding for bowel cancer in primary care. Three hundred and nineteen consecutive patients over the age of 34 years consulting their GPs with rectal bleeding were included in the study. Investigation was by flexible sigmoidoscopy or a questionnaire and review of all patients took place after 18 months.