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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 |