2911422
Description
Flashcards by Lilian Vieyra, updated more than 1 year ago
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Created by Lilian Vieyra
almost 9 years ago
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| Question | Answer |
| Overview | 5-6m long -GUT: Hollow tube open at both ends (mouth and anus) -GASTROINTESTINAL TRACT: oral cavity, pharynx, esophagus, stomach, small intestine & large intestine. -ACCESSORY STRUCTURES: teeth, tongue, salivary glands, pancreas, liver, gallbladder |
| Nutrition | Metabolic process that allows organisms to obtain energy |
| Extrecellular Digestion | Mechanic & Chemical |
| Cellular Digestion | It occurs in animals lacking digestive system |
| Buccal Cavity | ~Mechanical digestion begings by chewing ~The salivary glands secrete amylase beginning with carbohydrate metabolism ~The bolus formed is swallowed & passes through the pharynx ~Taste transduction signals for proper digestion |
| Mucosa's components | Permeable coating epithelium LAMINA PROPRIA: glands, blood vessels, lymphatic tissue MUSCLE TISSUE: smooth muscle cells |
| Mucosa's Functions | Protection Absortion Secretion |
| Stomach | Where metabolism of proteins begins Covered by epithelial tissue Parts: cardia, fudus, body, pylovus, antrum |
| Stomach | -Muscular cavity where peristalsis begins -Pepsin & hydrochloric acid are secretedin from the stomach wall -It's lined by gladuñar epithelial tissue -It's between 1000 & 1500cm^3 capacity |
| Small Intestine | Coiled tube of 2.5 cm diameter & 6 m long Intestinal villi is located in epithelial cells of the intestine |
| Small Intestine Beginning & End | Begins in the duodenum in the final part of the stomach Ends at the ileocecal junction where the large intestine stars |
| Small Intestine Function | Digestion & absorption of food |
| Intestine wall conssts of 3 layers | Muscularis mucosa Lamina A third layer in the interior or lumen of the small intestine |
| Liver | -Organ & the largest gland in the human body -Remove harmful substances from blood -Secretes bile (helps digest food, filter harmful chemicals) |
| Pancreas | Glandular organ that produces endocrine and exocrine secretions Endocrine function: insulin & glocagon Exocrine function: pancreatic juice comprises amylase, lipase, trypsin, chymotrypsin, carboxypeptidases & nucleases (metabolizan) |
| Large Intestine | Absorptive function: water & electrolytes (chief fuction of colon) Secretory function Synthesis function Storage function: unwanted substances from faeces are stored in pelvic colon |
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