| 释义 |
DictionarySeeplexusenteric plexus
enteric plexusA complex autonomic nerve plexus inside the walls of the gastrointestinal tract, from esophagus to anus. The plexus contains intrinsic sensory and motor axons connected through local ganglionic interneurons. It is also joined by postganglionic sympathetic axons from external autonomic ganglia and preganglionic parasympathetic axons from the vagus nerve. Peristalsis, vasodilation, vasoconstriction, and secretion and absorption of substances from the intestinal lumen are controlled by this intrinsic neural network. The ganglion cells and axons of the enteric plexus that are found between the circular and longitudinal layers of muscles in the lamina externa are collectively called the myenteric division of the enteric plexus; the ganglion cells and axons found in the submucosa are called the submucosal division of the enteric plexus. See: enteric nervous systemSee also: plexus |