Enteric Nervous System

Enteric Nervous System - Digestive System Enteric Nervous...

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Digestive System Enteric Nervous System * Regulates digestive tract motility, secretion, and blood flow * Composed of two ganglionated nerve networks * Submucosal (Meissner) plexus- in the submucosa * Myenteric (Auerbach) plexus- between the two layers of the muscularis externa * Myenteric (Auerbach) plexus- larger plexus, situated between the circular and longitudinal layer of the muscularis externa * Contains neurons responsible for motility and for mediating the enzyme output of adjacent organs * Submucosal (Meissner)plexus- smaller plexus * Contains sensory cells that “talk” to the motor neurons of the myenteric plexus * Motor fibers that stimulate secretion from epithelial crypt cells in the gut lumen * Note parasympathetic (vagal) fibers entering the bowel in the mesentery, perivascular sympathetic input to the gut, and the subepithelial plexus of nerve fibers in the lamina propria of the mucosa Auerbach’s Plexus General Histology Peritoneum - is the largest serous membrane in the body. Composed of the
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This note was uploaded on 01/30/2012 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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Enteric Nervous System - Digestive System Enteric Nervous...

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