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Digestive System
A&P II Gwinnett Technical College
| Term | Definition |
|---|---|
| accessory digestive organs | food does not pass through these organs (ex. liver, pancreas, gall bladder) |
| acetylcholine, histamine, gastrin | three chemicals that act on the parietal cell to increase acid production |
| acinus | exocrine cells arranged in a sac-like structure |
| adventitia | outermost connective tissue later found on organs outside the peritoneal cavity |
| amino acids | form proteins are in when they are absorbed in the intestines |
| ampulla of Vater | anatomical structure formed by the union of the pancreatic duct and common bile duct prior to entrance into the duodenum |
| amylase | chemical digestion in mouth (starch) |
| amylase | enzyme made by parotid gland |
| amylase, lysozyme, ions, water, mucus | five components of saliva |
| bicarbonate | chemical made by the pancreas to neutralize stomach acid |
| bile | fluid that emulsifies fats (breaking into smaller fat droplets) |
| bile salts | part of bile that emulsifies fats |
| bilirubin | part of bile that comes from hemoglobin |
| bolus | ball of food that if formed in the mouth prior to deglutition |
| Brunner's gland | structure that makes mucus - located in the duodenal submucosa |
| brush border enzymes | small intestine enzymes that include disaccharidases and dipeptidases located in the membrane of microvilli |
| cardia | part of the stomach around opening to the esophagus |
| cholecystokinin | hormone that causes gall bladder contraction, secretion of pancreatic juice high in enzymes , feeling of fullness, shut down of stomach secretion |
| chylomicron | lipoprotein made by the small intestinal epithelial cell that travels in the lymph |
| chylomicron, LDL, HDL | three lipoproteins |
| common hepatic duct | bile duct formed by merging of right and left hepatic ducts |
| crown | part of the tooth above the gum |
| Crypt of Lieberkuehn | deep crevice between two villi in the small intestine |
| cystic duct | bile passageway between common hepatic duct and the gall bladder |
| deglutition | swallowing |
| diaphragmatic hernia | a condition when portion of the stomach develops in the thoracic cavity - present in newborns |
| diffusion | process by which fats are absorbed in the small intestine |
| duodenum, jejunum, ileum | three parts of the small intestine |
| enteroendocrine cell | epithelial cells in the stomach and intestines that make hormones |
| enterokinase | enzyme that activated trypsinogen |
| epithelium, lamina propria, muscularis mucosa | three parts of the mucosa of GI organs |
| facilitated diffusion | process by which water-soluble amino acids and monosaccharides are absorbed in the small intestine |
| falciform ligament | form of peritoneum that connects the liver and the diaphragm |
| fatty acids and monoglycerides | form triglycerides are in when they are absorbed in the small intestine |
| flatus | gas |
| G-cell | cell that makes gastrin (enteroendocrine cell of the stomach) |
| gastrin | hormone made by G-cells that increases acid production by the stomach |
| gingiva | gum |
| greater omentum | fold of peritoneum that hangs from the stomach over the abdominal organs (fatty apron) |
| haustra | puckers of the large intestine due to the taeniae coli |
| HCl and intrinsic factor | products of parietal cells |
| hepatic artery | artery that brings oxygenated blood to the liver |
| hepatic portal vein | blood vessel that brings nutrients from the intestines to the liver before they reach the general circulation |
| hiatal hernia | a condition when a portion of the stomach protrudes through the diaphragm into the thoracic cavity |
| hydrolysis | adding water to break a bond |
| ileocecal valve | valve located between the small and large intestines |
| inner circular and outer longitudinal layers of smooth muscle | two laters of muscularis externa |
| intraperitoneal | an organ that is surrounded on all sides by peritoneum |
| jaundice | elevated bilirubin in the blood |
| jejunum | site of most nutrient absorption |
| jejunum, ileum | parts of the small intestine that are entirely intraperitoneal |
| Kupffer cells | cells found in sinusoids of the liver |
| labia | lip |
| lacteal | lymph vessel present in the villus of the small intestine |
| lesser omentum | fold of peritoneum that connects the liver and the stomach |
| lipase | pancreatic enzyme that breaks down fats |
| make insulin (and glucagon) | purpose of the iselt of Langerhans |
| mastication | chewing |
| maxillae and palatine | bones that make up the hard palate |
| mesentery proper | fold of peritoneum that connects the small intestine to the posterior wall |
| mesocolon | fold of peritoneum that connects the transverse colon with the abdominal wall |
| microvilli | extensions of the cell membrane on the small intestinal epithelial cell |
| molar | type of tooth for grinding food |
| monosaccharides | form carbohydrates are in when absorbed in the intestine |
| mucus acinus | type of acinus makes thick secretion high in mucus |
| oropharynx and laryngopharynx | parts of the pharynx for both food and air |
| pancreas, parotid gland | glands that contain almost entirely serous acini |
| pancreatic amylase | pancreatic enzyme that breaks down carbohydrates |
| Paneth cell | cell in intestine that makes lysozyme (antibacterial) |
| parasympathetic nervous system | part of the ANS that causes defecation |
| pepsin (protein) | chemical digestion in stomach |
| pepsinogen | product of chief cell |
| periodontal ligament | structure that connects tooth to bone in a gomphosis |
| peristalsis | contraction of circular and longitudinal muscles throughout the digestive tract to move food forward |
| Peyer's Patch | large lymphatic tissue nodules present in the submucosa of the ileum |
| plica circulares | circular folds of the submucosa and mucosa in the small intestine |
| pulp cavity | hollow part of the tooth that contains blood vessels and nerves |
| pyloric valve | valve between the stomach and duodenum |
| retroperitoneal | an organ that has only one side covered by visceral peritoneum (duodenum, kidney, pancreas) |
| root | part of the tooth below the gum |
| rugae | folds of mucosa and submucosa in the stomach |
| secretin | hormone that causes secretion of pancreatic juice high in bicarbonate, shut down of stomach secretion |
| segmentation | random constriction of the circular layer of muscle in the small intestine |
| serosa or visceral peritoneum | most superifical histological layer of an intraperitoneal organ |
| serous acinus | type of acinus that makes watery secretion |
| simple columnar | type of epithelium lining the stomach |
| simple squamous | type of epithelium in visceral peritoneum |
| sinusoid | type of capillary (very leaky) in the liver |
| smooth | type of muscle tissue found in muscularis mucosa |
| some B vitamins and K | vitamins made by bacteria in the GI tract |
| stratified squamous | type of epithelium lining the esophagus |
| sublingual gland | gland that contains almost entirely mucus acini |
| submandibular gland | gland that contains relatively equal amounts of mucus and serous acini |
| sucrase, maltase, lactase | three disaccharidases |
| taeniae coli | longitudinal bands of muscle in the large intestine |
| triad region | histological region between liver lobules that contain bile duct, hepatic artery, and branch of the hepatic portal vein |
| trypsin | enzyme that activates chymotrypsinogen |
| trypsinogen, chymotrypsinogen, procarboxypeptidase | three pancreatic zygomens (proenzymes) |
| vagus | nerve involved in cephalic phase of stomach control |
| villi | extensions of the lamina propria in the small intestine to create finger-like extensions |
| vitamin B12 absorption | purpose of intrinsic factor |
| zygomen or proenzyme | inactive form of an enzyme |