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12 Cards in this Set

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Digestive tract pathway
Oral cavity --> pharynx --> esophagus --> stomach --> small intestine --> large intestine --> anus
Peristalsis
-Involuntary muscular contractions that cause food to move down the esophagus
Glands of the stomach
-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.
Small intestine divisions
1. Duodenum
2. Jejunum
3. Ileum

-Numerous projections extend out of the intestinal wall, called villi.
Digestion Enzymes
1. Gastrin

2. Intrinsic factor

3. Cholecystokinin

4. Secretin
Gastrin
-produced in G cells of duodenum

-stimulates HCl, histamine, and pepsinogen secretion.
Intrinsic factor
Helps the absorption of vitamin B across intestinal lining.
Cholecystokinin
-stored in I cells of duodenal.

-Stimulates pancreatic enzymes
Secretin
-synthesized and stored in S cells of upper intestine.

-Stimulates secretion of bicarbonate-containing substances from pancreas.
Liver
-produces bile.

-stores bile in gall bladder

-bile breaks down fat in small intestine
Pancreas
-Produces enzymes for carbohydrate, protein,and fat digestion.
Large intestine
Absorbs salts and water