Chapter 56.pe - Chapter56 Introductiontothe...

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Chapter 56 Introduction to the  Gastrointestinal System
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Gastrointestinal System 
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Gastrointestinal System (cont.) The GI system is the only system in the body open to the  external environment Composed of one continuous tube  Begins at the mouth Progresses through the esophagus, stomach, and small  and large intestines Ends at the anus Accessory organs Pancreas Liver  Gallbladder
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Major Activities of the GI System Secretion of enzymes, acid, bicarbonate, and mucus Absorption of water and almost all of the essential  nutrients needed by the body Digestion of food into usable and absorbable  components Motility of food and secretions through the system  
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Layers of the GI Tube Mucosa Muscularis mucosa  Nerve plexus Adventitia
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Layers of Nerves in the Nerve Plexus Submucosal layer  Myenteric layer
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Layers of the Gastrointestinal Tract
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This note was uploaded on 02/19/2011 for the course RNSG 1301 taught by Professor Loftin during the Spring '11 term at Lone Star College.

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Chapter 56.pe - Chapter56 Introductiontothe...

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