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Digestive System

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Term
Definition
amylase   enzyme contained in saliva that breaks down starch  
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appendix   tubular organ attached to the lower end of the cecum; serves as a source for immune cells  
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bile   yellow green fluid by the liver that aids in digestion  
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cecum   blind pouch that serves as the beginning of the large intestine  
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chief cells   cells in the gastric mucosa that secrete digestive enzymes  
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chyme   semi fluid mixture consisting of particles of food mixed with digestive juices  
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dentin   firm, yellowish tissue forming the bulk of a tooth  
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duodenum   the first 10 inches of the small intestine; the portion intestine that performs most digestive processes  
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enteric nervous system   network of nerves innervating the digestive system  
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enteroendocrine cells   cells in the gastric mucosa that secrete the hormone ghrelin  
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esophagus   muscular tube connecting the pharynx to the stomach  
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gallbladder   sac attached to the liver that stores and concentrates bile  
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gastric pits   depressions within the gastric mucosa containing glands that secrete components of gastric juice  
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gingiva   tissue surrounding the necks of teeth; the gums  
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hard palate   bony structure that separates the mouth from the nasal cavity  
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haustra   pouches along the length of the large intestine  
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ileum   the third and last portion of the small intestine  
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jejunum   the second portion of the small intestine; location where many nutrients are absorbed  
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lipase   enzyme that digests fat  
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mastication   process of chewing, which begins the digestion of food  
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mesentery   sheet of connective tissue that suspends the digestive organs within the abdominal cavity  
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parotid gland   salivary gland located just underneath the skin anterior to the ear  
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peristalsis   wave like muscular contractions that propel food along the digestive tract  
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proteases   enzymes working in the stomach and small intestine that break peptide bonds  
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rugae   folds of mucosa and submucosa in the stomach  
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salivary glands   glands in the oral cavity that secrete saliva  
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segmentation   type of contraction in the small intestine that involves ring like constrictions  
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soft palate   structure consisting mostly of skeletal muscle that forms an arch between the mouth and nasopharynx  
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