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30 Cards in this Set
- Front
- Back
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The tongue is divided by this terminalis:
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Sulcus Terminalis to anterior 2/3 and posterior 1/3
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What are the 4 specialized mucosa of the dorsal surface of the tongue?
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1. filiform papillae
2. fungiform 3. circumvallate 4. foliate |
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What are some characteristics of filiform papillae?
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* most numerous and small
* conical * no taste buds * highly keratinized * elongation CT w/ strat squamous |
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What are some characteristics of fungiform papillae?
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* mushroom shaped
* dorsal surface * taste buds * near tip of tongue |
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What are some characteristics of circumvallate papillae?
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* large dome shpaed
* anterior to sulcus term * surrounded by moat like space * lots of taste buds * Von Ebner's glands |
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What is glands of von ebner?
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serous secretion into the moat of cicumvallate papillae
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What are some characteristics of foliate papillae?
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* parallel ridges of epith CT
* taste buds * lateral edge of tongue |
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What are the 3 cell types of taste buds?
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neuroepith, supporting cells, and basal cells
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What are the 4 distict layers of alimentary canal?
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1. mucosa
2. submucosa 3. muscularis 4. serosa |
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What are the fxns of mucosa?
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1. help passage of bolus
2. provide slective barrier |
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What's the fxn of muscularis mucosae?
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* form boundary between mucosa and submucosa
* deepest of mucosa * 2 layers (inner and outer longit) |
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What are some characteristics of submucosa?
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* mod dense irreg CT
* larger blood vessels *nerve plexuses * glands occur here |
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What is serosa?
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membrane containing simple squam epith
(mesothelium) |
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What is adventitia?
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* blends with CT of surrounding structures
* covers extraperitoneal organs (colon, duodenum) * loose CT |
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What are some characteristics of esophagus?
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* 25 cm long
* most muscular segment of GI * has typical 4 layers |
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What are the two types of glands of the esophagus?
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1. esophagel glands proper
2. cardiac glands |
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What are some characteristics of Esophageal glands proper?
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* occur in submucosa
* most in upper half but scat * acidic & lubricates lumen |
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What are some characteristics of esophageal cardiac glands?
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* in lamina propria of mucosa
* produce neutral mucous to prevent regurgiation * |
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What are some things that stomach lining absorb?
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* some water
* salts * lipid soluble drugs * alcohol * certain drugs |
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What are the three regions of the stomach?
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1. cardia
2. pylorus 3. fundus |
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What are some characteristics of cardiac gland?
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* near esophag orifice
* contrib to gastric juice * tortuous * composed of mucous secreting cells |
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What are some characteristics of fundic glands?
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* called gastric glands
* produce digestive juice * extend from bottom gastric pits to muscularis mucosae |
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What 4 funcitonal cell types compose the funidc glands?
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1. mucous neck cells
2. chief cells 3. parietal cells 4. enteroendocrine cells |
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What are some characteristics of pyloric glands?
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* located btwn fundus and pylorus
* neuroendocrine cells * branched tubular glands * |
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What are some characteristics of neck cells (fundic glands)?
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* neck region of stomach
* shorter than surface of mucous cell * secretes a soluble mucous |
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What are some characteristics of parietal cells (fundic glands)?
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* aka oxyntic cells
* secrete HCl * neck of stomach * beaded appearance * large cells |
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What are some characteristics of cheif cells (fundic glands)?
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* deepest part of fundic
* intense basophilia * secrete (pepsinogen & weak lipase) |
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What are some characteristics enteroendocrines (fundic glands)?
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* any level of stomach glands
* sit on basal lamina * produce gastrin, secrtin, CCK * secrete product to lamina propria |
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What are some characteristics of small intestine?
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* longest component (6 m)
* 3 segments duodenum, jejenum, and ilium |
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What are some functions of small intestine?
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* passage of unabsorbed material
* hormone production * principle site of digestion and absorption |
