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The Digestive/Urinary System, Luis Madrigal, P.5 (Disorders of the…
The Digestive/Urinary System, Luis Madrigal, P.5
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Layers of the GI tract
Muscularis externa
Moves food through the digestive tract (propulsion); mix food with digestive juices and enzymes (segmentation)
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Submucosa
Major site of blood vessels, lymph vessels, and nerves; in the stomach, it contains elastic fibers to help it regain its shape
Mucosa
Secretes mucus, enzymes, and hormones; absorbs nutrients into the blood and lymph
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