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Chapter 5 & 6 - Digestive System Terms

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Term
Definition
absorption   passage of materials through to walls of the small intestine into the bloodstream  
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amino acids   small building blocks of proteins; released when proteins are digested  
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amylase   enzymes secreted by the pancreas and salivary glands to digest starch  
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anus   terminal end of opening of the digestive tract to the outside of the body  
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appendix   blind pouch hanging from the cecum  
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bile   digestive juice made in the liver and stored in the gallbladder  
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bilirubin   pigment released by the liver in bile  
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bowel   intestines  
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canine teeth   pointed teeth next to the incisors  
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cecum   first part of the large intestine  
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colon   consists of the ascending, transverse, descending, and sigmoid segments  
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common bile duct   carries bile from the liver and gallbladder to the duodenum  
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defecation   elimination of feces  
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deglution   swallowing  
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dentin   primary material found in teeth  
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digestion   breakdown of complex foods to simpler forms  
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duodenum   first part of the small intestines  
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elimination   act of removal of materials from the body  
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emulsification   physical process of breaking up fat globules  
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enamel   hard, outermost layer of a tooth  
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enzyme   chemical that speeds up reactions between substances  
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esophagus   tube connecting the throat to the stomach  
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fatty acids   substances produces when fats are digested  
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feces   solid wastes; stool  
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gallbladder   small sac under the liver; stores bile  
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glucose   simple sugar  
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glycogen   starch; glucose is stored in the form of glycogen in liver cells  
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hydrochloric acid   substance produces by the stomach; necessary for digestion of food  
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ileum   third part of the small intestines  
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incisor   on of four front teeth  
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insulin   hormone produces by endocrine cells of the pancreas;  
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jejunum   second part of the small intestine  
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lipase   pancreatic enzyme needed to digest fats  
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liver   large organ located in the RUQ of the abdomen  
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lower esophageal sphincter (LES)   ring of muscles between esophagus and stomach  
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mastication   chewing  
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pancreas   organ under the stomach; produces insulin and anzymes  
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papillae   small, nipple-like elevations on the tongue  
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parotid glands   salivary gland within the cheek, just anterior to the ear  
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peristalsis   rhythmic contractions of the tubular organs  
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pharynx   throat,  
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portal vein   large vein bringing blood to the liver from the intestines  
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protease   enzyme that digests protein  
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pyloric sphincter   ring of muscles at the end of the stomach  
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pylorus   distal region ofthe stomach  
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rectum   last section of the large intestine, connecting the end of the colon and the anus  
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rugae   ridges on the hard palate and the wall of the stomach  
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saliva   digestive juice produced by salivary glands  
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salivary glands   parotid, sublingual, and submandibular glands  
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sigmoid colon   forth and last segment of the colon  
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sphincter   circular ring on muscle that constricts a passage or closes a natural opening  
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stomach   muscular organ that receives food from the esophagus  
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triglycerides   fat molecules composed of three parts fatty acids and one part glycerol  
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uvula   soft tissue hanging from the middle of the soft palate  
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villi   microscopic projections in the wall of the small intestine that absorb nutrients into the bloodstream  
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