PLN 103 Lecture Notes - Lecture 6: Flatulence, Lesser Omentum, Parotid Duct
26 Oct 2015
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Ie. mouth, pharynx, esophagus, stomach, small intestine, large intestine. Ie. teeth, tongue, gallbladder, salivary gland, liver, pancreas. Amount of enzyme release depends on composition of food consumed: mechanical processing. Cells of gi tract are habitual to your diet. Get used to not digesting fat > lots of fat > oily, wet stool. Makes materials smaller to go down gi tract. Increases food"s surface area (more susceptible to attacking enzymes) Tearing and mashing with teeth, squashing and compacting with tongue. Chemical breakdown of food into small fragments, for absorption. Epithelial cells can absorb glucose, but not larger molecules. Release of water, acids, enzymes, buffers, salts. Movement of molecules, electrolytes, vitamins, water into interstitial uid. Defecation: ejects materials from digestive tract, eliminating feces: absorption, excretion, digestion, secretion. Most digestive organs reside in abdominopelvic cavity. Abdominopelvic cavity > peritoneal cavity > lined by serous membrane. Serous membrane produces peritoneal uid (lubricates surface) Membrane secretes and absorbs 7l of uids a day.
