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15 Cards in this Set
- Front
- Back
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organs of the alimentary canal |
mouth, pharynx, esophogus, stomach, small intestine, large intestine |
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function of the digestive system |
ingestion mechanical digestion- chewing mixing chemical digestion- prepulshion- absoption- mostly through S.I. Defication- elimination of waste
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4 layers of alimentary canal -esophagus |
1 mucosa- mucus membrane stratified squamus 2 submucosa -irregular conective tissue contains glands nerves blood vessles lympnodes 3 muscular layer 2 layers of smooth muscle inner circular and outer longitudinal 4 adventitia fibrous sheath covering muscular layer |
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4 layers of alimentary canal -SI |
1 mucosa- mucus membrane simple columnar for secreation obsorption 2 submucosa -irregular conective tissue contains glands nerves blood vessles lympnodes 3 muscular layer 2 layers of smooth muscle inner circular and outer longitudinal 4 serosa -serous membrane covers muscular layer in peritoneal cavity |
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movement of alimentary canal |
mixing movement segmentation
peristalsis pushing movement |
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phases of gastric secretion |
1 cephalic phase trigger by thought or smell of food increases activity
2 gastric phase -triggered by presence of food in the stomach increases gastric activity
3 intestinal phase -triggered by of food in the duodenum SI inhibits activity
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gastrin |
increse gastric activity comes from stomach and duodinum |
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CCK |
decrease gastric activity stimulates pancrease and gallader comes from the duodenum |
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secretin |
decrease gastric activity stimulates pancrease and liver comes from the duodenum |
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pairs of teeth |
2pairs incisors 1pair cuspid or canis 2 pairs bi cuspids or premolars 3pairs of molars or tricuspids |
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salivary glands |
parotid gland -stenson's duct secretes watery fluidrich in amylase
submandibular -wharton's duct produces some mucus
sublingual -rivinus' duct produces mucus viscus |
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tongue |
papilliae -rough projections filiform treadlike gives rough surface fungiform mushroom like with taste buds circumvallate 10-12 many taste buds lingual frenulumanchors tongue |
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nasopharynx |
nasil cavity to soft pallet uvula descends to stop food entering nasil cavity |
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oropharynx |
soft pallet to hyoid bone |
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laryngopharynx |
hyoid to level of lyrnx |
