BIOL 221 Lecture Notes - Lecture 8: Muscular Layer, Muscularis Mucosae, Falciform Ligament
4 Mar 2020
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The visceral peritoneum or serosa forms several double-layered structures. The greater omentum holds a large amount of adipose and hangs from the stomach. The falciform ligament helps support the liver. The mesenteries also connect the small intestine to the posterior abdominal wall. Intraperitoneal organs, such as the most of the small intestine, are completely surrounded by visceral peritoneum. The mesocolon connects much of the large intestine to the posterior abdominal wall. The enteric nervous system consists of sensory and motor neurons and interneurons. Visceral receptors respond to stretch, other physical changes, and chemical changes in digestive tract organs. The sensory neurons connect to the central nervous system and directly to local interneurons and motor neurons. The submucosal nerve plexus regulates activity of glands in the submucosa and smooth muscle of the muscularis mucosae and muscularis externa. The myenteric nerve plexus regulates activity of muscularis externa with aide of submucosal nerve plexus.
