digestive system
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| Ingestion | occurs when materials enter the digestive tract via the mouth.
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| Mechanical Processing | crushing and shearing that makes materials easier to propel along the digestive tract
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| Digestion | the chemical breakdown of food into small organic fragments suitable for absorption by the digestive epithelium.
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| Secretion | the release of water, acids, enzymes, buffers, and salts by the epithelium of the digestive tract and by glandular organs.
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| Absorption | the movement of organic substrates, electrolytes, vitamins, and water across the digestive epithelium and into the interstitial fluid of the digestive tract.
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| Excretion | the removal of waste products from body fluids.
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| The lining of the digestive tract plays a protective role by safeguarding surrounding tissues against: | 1. The corrosive effects of digestive acids and enzymes 2. Mechanical stresses, such as abrasion 3. Bacteria that either are swallowed with food or reside in digestive tract.
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| Visceral Peritoneum | covers organs within the peritoneal cavity
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| Parietal Peritoneum | lines the inner surfaces of the body wall
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| Mesentery | double sheets of peritoneal membrane
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| Lesser omentum | stabilizes the position of the stomach and provides an access route for blood vessels and other structures entering or leaving the liver
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| Falciform Ligament | helps stabilize the position of the liver relative to the diaphragm and abdominal wall
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| The major layers of the digestive tract: | 1. Mucosa 2. Submucosa 3. Muscularis externa 4. Serosa
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| Mucosa | Inner lining of the digestive tract
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| Enteroendocrine Cells | secretes hormones that coordinate the activities of the digestive tract and the accessory glands.
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Created by:
jriewestahl
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