X-ray of large intestine


Large intestine. Computer-enhanced colored X-ray image of the human abdomen showing the large intestine (colon), after a barium enema. The dilated colon has three regions. At left is the cecum and the ascending region (yellow) of the colon; at top, the transverse colon runs horizontally and up to the right, leading to the descending colon (at right). At bottom center is the rectum. The colon absorbs water and electrolytes from digested food; periodic muscular contractions move the dehydrated contents (feces) towards the rectum. A barium enema is a suspension of barium sulphate (which is opaque to X-rays) that is infused into the rectum.

Credit: Scott Camazine / Science Source

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