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Digestive Tract

Digestive Tract. Esophagus (No.2) Stomach (No.25) Small intestine (N0.1) Large intestine (No.26). Jun Zhou School of Medicine, Zhejiang University. Mucosa Submucosa Muscularis externa Adventitia. Esophagus (No.2). Mucosa Epi. Lamina propria Muscularis mucosae Submucosa

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Digestive Tract

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  1. Digestive Tract Esophagus (No.2) Stomach (No.25) Small intestine (N0.1) Large intestine (No.26) Jun Zhou School of Medicine, Zhejiang University

  2. Mucosa • Submucosa • Muscularis externa • Adventitia Esophagus (No.2)

  3. Mucosa • Epi. • Lamina propria • Muscularis mucosae • Submucosa • LCT • Mucus-secreting glands • Muscularis externa

  4. Mucosa • Epi. • Lamina propria • Muscularis mucosae

  5. Muscularis mucosae ducts Mucus-secreting glands Mucus –secreting glands in the submucosa

  6. Muscularis externa Esophagus: adventitia

  7. Mucosa Submucosa Muscularis externa Stomach (No.25) Serosa

  8. Epithelium (mucus secreting cells) Parietal cell Lamina propria Chief cell Muscularis mucosae Mucosa of stomach

  9. Mucosa • Epithelium Mucus secreting cells • Lamina propria CT, Gastric gland • Muscularis mucosae Stomach

  10. In the neck and body of the glands • Column or pyramidal • Eosinophilic cytoplasm Parietal cells

  11. In the body and base of the glands • Columnar • Basophilic cytoplasm Chief cells

  12. Muscularis externa • Myenteric plexus

  13. Small intestine • Mucosa epi. lamina propria muscularis mucosa • Submucosa • Muscularis externa • Serosa Luminal surface modification: 1.Plicae circulares 2.Intestinal villi 3.Microvilli

  14. Mucosa • Submucosa • Muscularis externa • Serosa Human jejunum

  15. Villus • Epithelium 1.absorptive cell striated border (microvilli) 2.Goblet cell • Lamina propria CT+SM

  16. Intestinal glands • Columnar cells • Goblet cells • Paneth cells • at the base of the crypts • 3-5 in a group • Acidophilic G.

  17. Muscularis externa • Myenteric plexus

  18. Serosa • CT • Mesothelium

  19. Large intestine Small intestine

  20. No villi • No Paneth cell • Numerous Goblet cells

  21. Large intestine: Muscularis externa with myenteric plexus

  22. THE END

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