BIOM 3200 Lecture Notes - Lecture 12: Defecation, Emulsion, Bilirubin
19 Dec 2017
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Identify major anatomical regions of the alimentary canal and accessory digestive organs; Mouth, pharynx, salivary glands, esophagus, stomach, liver, pancreas, gallbladder, sma intestine (duodenum, jejunum, ileum), large intestine, rectum, anus. Describe the organization and function of the enteric nervous system; Outer myenteric plexus is found along the entire length of the gi tract. The inner submucosal plexus is found only in the small and large intestine. Has interneurons as well as sensory and autonomic neurons. It s glial cells resemble the astrocytes of the brain. Some sensory afferent neurons within the intestinal plexuses tra in the vagus nerve to deliver sensory information to the brain, called extrinsic afferents. Intrinsic afferents have their cell bodies in the myenteric or submucosal plexuses. Peristalsis is regulated by the enteric nervous system. Chyme stimulates intrinsic affere that activate enteric interneurons. Extrinsic afferents together with the different peptide hormones released from the intestine alert the brain to conditions in the gi tract.
