PHGY 210 Lecture Notes - External Anal Sphincter, Muscularis Mucosae, Loose Connective Tissue
22 Aug 2012
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Document Summary
Site of nutrient processing providing raw materials for growth, repair, function & regulation. Earthworm: hollow tube with lumen (central cavity) Mammals: hollow tube with lumen, communication with external environment @ both ends, 3x longer then height of person. Up to 9x longer in cadaver: interior lining 600x > exterior lining. 200-250m2 (1/2 tennis court: sequence of specialized organs that are interconnected. Serosa: thin tough layer of connective tissue, surrounds tube. Between upper 1/3 of esophagus & external anal sphincter. Duodenum: fe, ca, cho, proteins, lipids, water, Ileum: vitamin b12 & bile acids (not fat!) Distal ileum for bile salt absorption & intrinsic factor. Consists of ganglion cells & their processes. Integrates muscular & secretory elements: initiates, programs, regulates, coordinates. Synapse with: smooth muscle cells, endocrine cells, exocrine cells, other ganglion cells. Collection of nerve cell bodies & ganglion with their associated fibers. Interconnection between plexuses: muscle cells, epithelial cells, allows for single stimulus to activate a lot of cells.
