Chapter 23 The Digestive system

Chapter 23 The Digestive system - 8/16/2010 1 2 3 4 5 6 7 8...

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8/16/2010 1 Digestive System Chapter 23 Function The digestive system prepares food for cellular utilization. The beginnings of gastroenterology Alexis St. Martin – Shot through the stomach Dr. William Beaumont – Performed experiments: 1825-1833 Digestive Processes Ingestion – Taking of food into the mouth Propulsion – Movement of food Mechanical digestion – Chewing, mixing with saliva, churning, segmentation Digestive Processes Chemical digestion – Enzymatic breakdown of food molecules Absorption – Passage of molecules through the mucous membrane of the small intestine: blood/lymph Defecation – Discharge of indigestible wastes Alimentary canal/Gastrointestinal (GI) tract Accessory digestive organs The Alimentary Canal Serous membranes Layers of the GI tract
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This note was uploaded on 08/05/2011 for the course APK 2100 taught by Professor Dr.tillman during the Summer '07 term at University of Florida.

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Chapter 23 The Digestive system - 8/16/2010 1 2 3 4 5 6 7 8...

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