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The ileum (/ ˈ ɪ l i əm /) is the final section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds. In fish , the divisions of the small intestine are not as clear and the terms posterior intestine or distal intestine may be used instead of ileum. [ 2 ]
The main function of the ileum is to absorb ... Labeled diagram of the small intestine and its surrounding structures ... From colon 1 the ascending and transverse ...
The ileocecal valve [a] is a sphincter muscle valve that separates the small intestine and the large intestine. [1] Its critical function is to limit the reflux of colonic contents into the ileum. [2]
Cecum and beginning of ascending colon. The cecum is a pouch marking the division between the small intestine and the large intestine. It lies below the ileocecal valve in the lower right quadrant of the abdomen. [33] The cecum receives chyme from the last part of the small intestine, the ileum, and connects to the ascending colon of the large ...
lower duodenum, jejunum, ileum, cecum, appendix, ascending colon, and first two-thirds of the transverse colon: branches of the superior mesenteric artery: Hindgut: last third of the transverse colon, to the upper part of the anal canal: last third of the transverse colon, descending colon, rectum, and upper part of the anal canal
The cranial portion of the loop will develop into the jejunum and most of the ileum, while the caudal part of the loop eventually forms the terminal portion of the ileum, the ascending colon and the initial two-thirds of the transverse colon. As the foetus grows larger, the mid-gut loop is drawn back through the umbilicus and undergoes a ...
The length of the human colon is, on average 160.5 cm (measured from the bottom of the cecum to the colorectal junction) with a range of 80 cm to 313 cm. [11] The average inner circumference of the colon is 6.2 cm. [10] Thus, the inner surface epithelial area of the human colon has an area, on average, of about 995 cm 2, which includes ...
The cecum is an end point for the colon with a dead-end portion terminating with the appendix. [8] The connection between the end of the small intestine (ileum) and the start (as viewed from the perspective of food being processed) of the colon (cecum) is now clearly understood, and is called the ileocecal orifice.