NTDT200 Chapter Notes - Chapter 3: Pylorus, Bile Duct, Pancreatic Duct
25 Jan 2017
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Digestion process by which food is broken down in preparation for absorption. Absorption uptake of nutrients by cells of small intestine for transport into blood or lymph. Gastrointestinal (gi) tract the digestive tract; flexible muscular tube that extends from the mouth, through the esophagus, stomach, small intestine, large intestine and rectum to the anus. Lumen inner space within the gi tract that is continuous from 1 end to the other. Mouth where digestion begins; chew food into smaller pieces, has fluids that help dissolve food we eat to ease swallowing. Epiglottis prevents fluid or food from entering trachea when a person swallows (prevents choking) Pharynx passageway from nose and mouth to the larynx and esophagus. Esophagus the food pipe; conduit from mouth to stomach. Sphincter a circular muscle that surrounds and can close a body opening; found at specific points along gi tract, regulate flow of food particles. Esophageal sphincter sphincter muscle at upper or lower end of esophagus.
