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The Digestive System
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Overview of the Digestive System
Digestive Tract: Mouth, pharynx, and esophagus, stomach, small intestine, and large intestine (colon)
Accessory Organs:Teeth, tongue, salivary glands, pancreas, liver, and gallbladder
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Digestive system histology
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Digestive system histology
Identify:
•Mucosa
•Submucosa
•Muscularis
•Serosa or adventitia?
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Adventitia or serosa?
Adventitia (connective tissue around organs superior to diaphragm)
Serosa = visceral peritoneum
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Digestive system histology
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Oral Cavity
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The Pharynx
• Nasopharynx
• Oropharynx
• Laryngopharynx
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Salivary Glands
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The Esophagus
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Stomach
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Stomach
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Duodenum and Related Organs
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Small Intestine – Gross Anatomy• Three
subdivisions:duodenum, jejunum, and ileum
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Gross Anatomy of Large Intestine
•Cecum
•Appendix
•Ascending
•Transverse
•Descending
•Sigmoid colon
•Rectum
•Anus
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Pancreas and Gallbladder
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Gallbladder• Stores and concentrates bile
• Expels bile into duodenum• Bile emulsifies fats
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Visceral Surface of the Liver
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Microscopic Anatomy of Liver
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Mesenteries
• Superficial view of the abdominal organs
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Mesenteries
• Greater omentum and transverse colon reflected
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Mesenteries
• Sagittal section through the abdominopelvic cavity