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EBR EMS Chapter 15 Definitions

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alimentary canal   the digestive tract as a whole  
bolus   a small, rounded mass of masticated food to be swallowed  
cholecystectomy   the surgical removal of the gallbladder  
chyme   partially digested food mixture leaving the stomach  
deglutition   swallowing  
dental caries   decay of teeth  
diarrhea   defecation of liquid feces  
digestion   the breakdown of food materials either mechanically or chemically  
duodenal papilla   ducts located in the middle third of the duodenum that empty pancreatic digestive juices and bile from the liver into the small intestine; there are two ducts, the major duodenal papillae and the minor papillae  
duodenum   the first subdivision of the small intestine where most chemical digestion occurs  
emulsify   in digestion, when bile breaks up fat  
feces   waste material discharged from the intestines  
fractal geometry   the study of surfaces with a seemingly infinite area, such as the lining of the small intestine  
frenulum   the thin membrane that attaches the tongue to the floor of the mouth  
gastroesophageal reflux disease   also known as GERD, a set of symptoms resulting from a hiatal hernia that allows stomach contents to flow back into the esophagus; symptoms include heartburn or chest pain and coughing or choking during or just after a meal  
gastroesophageal sphincter   a ring of smooth muscle around the opening of the stomach at the lower end of the esophagus that acts as a valve to allow food to enter the stomach but prevents stomach contents from moving back into the esophagus  
greater omentum   a pouchlike extension of the visceral peritoneum  
hiatal hernia   a bulging out of the stomach through the opening of the diaphragm where the esophagus normally passes; this condition may prevent the valve between the esophagus and stomach from closing, thus allowing stomach contents to flow back into the esophagus  
ileum   the distal portion of the small intestine  
jaundice   abnormal yellowing of skin, mucous membranes, and white of eyes  
jejunum   the middle third of the small intestine  
lumen   the hollow space within a tube  
malocclusion   abnormal contact between the teeth of the upper jaw and lower jaw  
mastication   chewing  
mesentery   a large double fold of peritoneal tissue that anchors the loops of the digestive tract to the posterior wall of the abdominal cavity  
peristalsis   wavelike, rhythmic contractions of the stomach and intestines that move food material along the digestive tract  
peritoneal space   small, fluid-filled space between the visceral and parietal layers that allows the layers to slide over each other freely in the abdominopelvic cavity  
plica   multiple circular folds  
pyloric sphincter   sphincter that prevents food from leaving the stomach and entering duodenum  
rugae   wrinkles and folds  
ulcer   a necrotic open sore or lesion  
uvula   cone-shaped process hanging down from the soft palate that helps prevent food and liquid from entering the nasal cavities  
villus   fingerlike folds covering the plicae of the small intestines  


   


 

 

 

 

 

 
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