NHM 101 Lecture Notes - Lecture 4: Common Bile Duct, Duodenum, Ileum

• School: University of Alabama
• Department: Food Science
• Course: NHM 101
• Professor: Lori Greene

Document Summary

Explain mechanical and chemical processes of digestion in order. Explain how nutrients are routed in their circulatory systems from gi tract. Describe how bacteria influence health and activities of gi tract. Digestion: process by which food is broken down. Absorption: uptake of nutrients by the cells of small intestine for transport into either the blood or lymph system. Gastrointestinal (gi) tract- digestive tract flexible muscular tube that extends from mouth to anus: lumen: inner space within the gi tract and is continuous from one end to the other. Anatomy of digestive tract: mouth, esophagus, stomach, small intestine, large intestine (colon, rectum, anus. Process of digestion begins in the mouth. Fluids from food/beverages and from salivary glands blend with food for easy swallowing. Food is swallowed passes through pharynx epiglottis closes off airway food enters esophagus as the upper esophageal sphincter opens. Circular muscle surrounding, able to close a body opening. Keeps flow of food in one direction.