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Lab 9. Digestive Tract (2) &Digestive glands

Lab 9. Digestive Tract (2) &Digestive glands. Small intestine (N0.1) Large intestine (No.26) Pancreas (No.29) Liver (No.30) Exercise. 20131127. Small intestine. Mucosa epi. lamina propria muscularis mucosa Submucosa Muscularis externa Serosa. Luminal surface modification:

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Lab 9. Digestive Tract (2) &Digestive glands

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  1. Lab 9. Digestive Tract (2) &Digestive glands Small intestine (N0.1) Large intestine (No.26) Pancreas (No.29) Liver (No.30) Exercise 20131127

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

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

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

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

  6. Muscularis externa • Myenteric plexus

  7. Serosa • CT • Mesothelium

  8. Large intestine Small intestine

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

  10. Large intestine: Muscularis externa with myenteric plexus

  11. Pancreas • Capsule • Septa extend into the gland • Ill-defined lobule

  12. Exocrine gland Endocrine gland

  13. Exocrine portion: pyramidal serous cells centroacinar cells

  14. Intercalated ducts • Intralobular ducts • Interlobular ducts

  15. Intralobular ducts

  16. Intralobular ducts

  17. Interlobular ducts • Islets of Langerhands: scattered among the exocrine portion

  18. Liver • Capsule • Parenchyma: hepatocyte

  19. Liver lobule • Central vein • Plates of hepatocytes • Sinusoids

  20. Liver plates • Liver sinusoids: kupffer cells

  21. Hepatocyte, Kupffer cells

  22. Central vein : incomplete wall connect with liver sinusoids

  23. Portal area: Interlobular veins Interlobular arteries Interlobular bile ducts

  24. Human liver Pig liver

  25. The end!

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