Bio Digestio

GI tract/alimentary canal consists of: oral cavity, pharynx, esophagus, patronize, abase and large intestine, plus accessory structures much(prenominal) as teeth, tongue, pancreas, coloured and gallbladder. Functions: ingestion, automatic processing, digestion (chemical breakdown), secretion, absorption, excretion (defecation) Peritoneum: Parietal peritoneum; inner wall of abdominal muscleman cavity Visceral peritoneum; outer wall of organs cover by mesentery sheets that take over/suspend organs from abaxial wall of abdominal cavity. lesser omentums, A obstruct of the peritoneum connectedness parts of the stomach and duodenum to the liver greater omentum, A fold of the peritoneum, passing from the stomach to the transversal colon falciform ligament, a sickle-shaped sagittal fold of peritoneum that helps attach the liver to the stop Serous membrane secretes serous fluid for lubrication Histology of GI tract, 4 layers: 1. Mucosa,Mucus producing epithelial layer w ith supportive lamina propria underneath. Stratified squamous in argonas that shamt absorb and are prone to friction, such as oral cavity, pharynx, esophagus.Simple columnar with goblet cells in different areas. impart also have enteroendocrine cells that secrete hormones that regulate measure of digestion.

Mucularis mucosae: 2 thin layers of dispassionate muscle to assist in defining the lumen 2. Submucosa Connective tissue with blood and lymphatic vessels and center plexus Meissner plexus) that support and control mucosa. 3. Muscalaris externa, 2 larger layers of glint muscle, circular and longitudinal. Movement is mostly controlled by enteric macabre system (ENS), mostl y through parasympathetic stimulation 4. se! rosa, outmost layer. oral exam cavity, pharynx, esophagus, rectum have no serosa, instead are firmly attached to surrounding tissue by an adventitia Movement of bolus Persistalsis, Pacesetter cells of muscularis externa take on rhythmically in response to stretch receptors. Circularis muscles behind bolus take aim first, keeping...If you sine qua non to get a full essay, order it on our website: OrderEssay.net

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