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12 Cards in this Set
- Front
- Back
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Digestive tract pathway
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Oral cavity --> pharynx --> esophagus --> stomach --> small intestine --> large intestine --> anus
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Peristalsis
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-Involuntary muscular contractions that cause food to move down the esophagus
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Glands of the stomach
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-Secrete mucus: protects stomach lining from acidic juices in stomach
-Secrete pepsin: protein-hydrolyzing enzyme -Secrete HCl: kills bacteria and dissolves "glue" that holds food together. |
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Small intestine divisions
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1. Duodenum
2. Jejunum 3. Ileum -Numerous projections extend out of the intestinal wall, called villi. |
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Digestion Enzymes
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1. Gastrin
2. Intrinsic factor 3. Cholecystokinin 4. Secretin |
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Gastrin
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-produced in G cells of duodenum
-stimulates HCl, histamine, and pepsinogen secretion. |
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Intrinsic factor
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Helps the absorption of vitamin B across intestinal lining.
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Cholecystokinin
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-stored in I cells of duodenal.
-Stimulates pancreatic enzymes |
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Secretin
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-synthesized and stored in S cells of upper intestine.
-Stimulates secretion of bicarbonate-containing substances from pancreas. |
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Liver
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-produces bile.
-stores bile in gall bladder -bile breaks down fat in small intestine |
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Pancreas
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-Produces enzymes for carbohydrate, protein,and fat digestion.
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Large intestine
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Absorbs salts and water
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