Week 9 2402 Lab Digestive Syst_students.pptx - 2402 Week 9...

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2402 Week 9: The Digestive System Unit 24 Exercises 1-4
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Exercise 1: Anatomy of Digestive System – Alimentary canal & Accessory organs Mouth Pharynx Esophagus Stomach Sm Intestine Duodenum Jejunum Ileum Lg Intestine Ascending, transverse, descending colon Accessory Organs Salivary Glands Tongue Teeth Pancreas Liver Gall Bladder
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Mouth: Salivary Glands
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Mouth: Teeth
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Digestive Organs Be able to identify on diagrams and models Know name, location, and function of each organ (including parts of stomach, small & large intestine)
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1. Mucosa – 3 layers Inner epithelial lining Lamina propria Muscularis mucosae Fxns - protection, secretion, absorption 2. Submucosa CT binds mucosa to muscularis Contains many blood & lymphatic vessels Meissner plexus Wall of GI tract from lower esophagus anal canal has same basic 4 layers :
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Recall the wall of GI tract from lower esophagus to anal canal has same basic 4 layers: 3. Muscularis Skeletal muscle Mouth, pharynx, upper 2/3 of esophagus & anal sphincter Smooth muscle elsewhere Myenteric plexus 4. Serosa - visceral peritoneum Esophagus lacks serosa – has adventitia
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