Thursday, August 12, 2010

pituitary gland function

pituitary gland function

Digestive organsFunctions of digestive systemMouthKeeps food between teeth; Foods uniformly chewed during mastication.TeethSolid foods reduced to smaller particles for swallowing.TongueFood maneuvered for mastication.Salivary GlandsSecrete saliva; lining of mouth and pharynx lubricated; Salivary amylase splits starch into smaller fragments.PharynxMoves bolus of food from pharynx into esophagus; closes air passage ways.EsophagusPermits entry of bolus from pharynx into esophagus; pushes bolus down esophagus; permits entry of bolus into stomach; lubricates esophagus for smooth passage of bolus.StomachMaceration of food; Mixes it with gastric juice; reduce food to chime; Kills many microbes in food; Activates Pepsin.PancreasContains enzymes that digest carbohydrates, proteins, triglycerides and nucleic acids.LiverProduces bile; Emulsification and absorption of lipids in small intestine.Gall BladderStores and concentrates bile and releases it into small intestine.Small IntestineMixes chyme with digestive juices; Completes the digestion of carbohydrates, proteins, lipids and nucleic acids; Absorption of 90 % of nutrients and water.Large IntestineDrives the contents of colon into rectum; Absorption of some water, ions and vitamins; defecation.

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