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Chabner Chapter 5
The Digestive System (Vocabulary)
Term | Definition |
---|---|
Absorption | Passage of materials through the walls of the smal intestine into the bloodstream. |
Amino acids | Small building blocks of proteins (like links in a chain), released when proteins are digested. |
Amylase | Enzyme secreted by the pancreas to digest starch. |
Anus | Terminal end or opening of the digestive tract to the outside of the body. |
Appendix | Blind pouch hanging from the cecum (in the right lower quadrant [RLQ]). |
Bile | Digestive juice made in the liver and stored in the gallbladder. |
Bilirubin | Pigment released by the liver in bile. |
Bowel | Intestine. |
Canine teeth | Pointed, dog-like teeth next to the incisors. |
Cecum | First part of the large intestine. |
Colon | Large intestine, consisting of the cecum; the ascending, transverse, and descending segments of the colon; and the rectum. |
Common bile duct | Carries bile from the liver and gallbladder to the duodenum. |
Defecation | Elimination of feces from the digestive tract through the anus. |
Deglutition | Swallowing. |
Dentin | The primary material found in teeth. |
Digestion | Breakdown of conplex food to simpler forms. |
Duodenum | First part of the small intestine; the duodenum measures 12 inches long. |
Elimination | Act of removal of materials from the body; in the digestive system, the removal of indigestible materials as feces. |
Emulsification | Physical process of breaking up large fat globules into smaller globules, thereby increasing the surface area that enzymes can use to digest the fat. |
Enamel | Hard, outermost layer of a tooth. |
Enzyme | A chemical that speeds up a reaction between substances. |
Esophagus | Tube connecting the throat to the stomach. |
Fatty acids | Substances produced when fats are digested. |
Feces | Solid wastes; stool. |
Gallbladder | Small sac under the live; stores bile. |
Glucose | Simple sugar. |
Glycogen | Starch; glucose is stored in the form of glycogen in liver cells. |
Hydrochloric acid | Substance produced by the stomach; necessart for digestion of food. |
Ileum | Third part of the small intestine. |
Incisor | One of four front teeth in the dental arch. |
Insulin | Hormone produced by the endocrine cells of the pancreas. |
Jejunum | Second part of the small intestine. |
Lipase | Pancreatic enzyme necessary to digest fats. |
Liver | A large organ located in the RUQ of the abdomen. |
Lower esophageal sphincter (LES) | Ring of muscles between the esophagus and the stomach. |
Mastication | Chewing. |
Molar teeth | the sexth, seventh, and eighth teeth from the middle on either side of the dental arch. |
Palate | Roof of the mouth. |
Pancreas | Organ under the stomach; produces insulin (for transport of sugar into cells) and enzymes (for digestion of foods). |
Papillae (singular: papilla) | Small elevation on the tongue. |
Parotid gland | Salivary gland within the cheek, just anterior to the ear. |
Peristalsis | Rhythmic contractions of the tubular organs. |
Pharynx | Throat. |
Portal vein | Large vein bringing blood to the liver from the intestines. |
Protease | Enzyme that digests proteins. |
Pulp | Soft tissue within a tooth, containing nerves and blood vessels. |
Pyloric sphincter | Ring of muscle at the end of the stomach, near the duodenum. |
Pylorus | Distal region of the stomach, opening to the duodenum. |
Rectum | Last section of the large intestine, connecting the end of the colon and the anus. |
Rugae | Ridges on the hard palate and the wall of the stomach. |
Saliva | Digestive juice produced by salivary glands. |
Salivary glands | Parotid, sublingual, and submandibular glands. |
Sigmoid colon | Fourth and last, S-shaped segment of the colon, just before the rectum; empties into the rectum. |
Sphincter | Circular ring of muscle that constricts a passage or closes a natural opening. |
Stomach | Muscular organ that receives food from the esophagus. |
Triglycerides | Fat molecules composed of three parts fatty acids and one part glycerol. |
Uvula | Soft tissue hanging from the middle of the soft palate. |
Villi (singular: villus) | Microscopic projections in the wall of the small intestine that absorb nutrients into the bloodstream. |