CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY
Small intestine lining. Light micrograph of a section through the healthy mucosal lining of the duodenum, the first part of the small intestine, showing Brunner's glands. The main function of these glands is to produce a mucous-rich alkaline secretion (containing bicarbonate) in order to protect the duodenum from the acidic content of chyme (which is introduced into the duodenum from the stomach), provide an alkaline condition for the intestinal enzymes to be active, thus enabling absorption to take place, and to lubricate the intestinal walls.
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