NTDT200 Lecture Notes - Lecture 4: Common Bile Duct, Pylorus, Esophagus
5 May 2016
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Document Summary
No foods of animal origin to few restrictions. Lower, healthier body weight, diabetes, hypertension, heart disease, other dieases. Use variety of foods within an energy allowance to maintain a healthy body weight. Breaking down foods into nutrients (preparation for absorption) Challenges of digestion (tasks of the mouth, passage through diaphragm, steady movement, lubrication of food, digestive enzyme function and excretion of waste) Gi tract: flexible and muscular, path (mouth-esophagus-stomach-small intestine-large intestine-rectum-anus) Process of digestion begins in the mouth (chews and breaks up food) 5 basic taste sensations (sweet, sour, bitter, salty and savory) Two sphincter muscles control movement: upper and lower esophageal sphincter. Small: common bile duct, drips fluids from pancreas and gall bladder. Large: ilecocecal valve, withdrawal of water, rectum and anus. Peristalsis: circular and longitudinal muscles working together to push intestinal contents along. Stomach action: circular, longitudinal and diagonal muscles, timing the release of chime.
