1. Slot 4.1: Submandibular (left) and sublingual (right) glands m = mucous, s = serous, x = mixed, d = duct Serous demilunesD = duct; F = adipose cells Mucous acini

2. Slot 4.2: Parotid Gland uct Serous Acini

3. Slot 4.3: Gastric mucosa diagram (left to right, pyloric, fundic, cardaic)

4. Slot 4.4: Stomach sections P=parietal C=chief N=mucous neck L=lamina propria Arrows=entero- endocrine cells Base of gastric glandsNeck of gastric glands Gastric pits and gastric glands P=parietal I=isthmus N=neck L=lamina propria Arrows (left) = mucus Arrows (right) = gastric pits

5. Slot 4.5: Small intestine sections Ileum - villus Intestinal epithelium on villi g = goblet cell; arrowhead = brush border; Arrows = enteroendocrine cells; L = lamina propria; c = capillary, m = smooth muscle cell b = brush border; arrowheads = golgi; Arrows = junctional complexes joining adjacent cells

6. Slot 4.7: Large intestine sections Large intestineColon: Rectoanal junction

7. Slot 4.6: Appendix L = lumen M = mucosa S = submucosa a = adipose F = muscularis Arrows = crypts Arrowheads = lymph nodules

8. Slot 4.8: Liver C = central vein; P = portal canal Sinusoids Hepatocytes

9. Slot 4.9: Diagram of hepatic lobule

10. Slot 4.10: Liver sections LEFT: C = central vein P = portal canal Arrows=sinusoids RIGHT: e = endothelium Arrows=Kupffer cells Arrowhead = binucleate hepa- tocyte Central VeinPortal Canal Reticular fibers Sinusoids emptying into central vein Portal Vein = lymph vessel Bile duct Hepatic artery

11. Slot 4.11: Gall bladder sections g = mucous glands M = muscularis A = adventitia Simple columnar epithelium Lamina propria c = capillaries a = arteriole v = venule Arrowhead = golgi Lamina propria

12. Slot 4.12: Tongue - circumvallate papilla Primary papilla Secondary papilla Taste buds von Ebner’s glands

13. Slot 4.13: Tongue - foliate papillae Secondary papilla Taste buds von Ebner’s glands

14. Slot 4.14: Tongue - foliate papillae Secondary papilla Taste buds von Ebner’s glands

15. Slot 4.15: Esophagus (c.s.)

16. Slot 4.16: Esophagus section Mucosa (stratified squamous epithelium) Submucosa Lamina propria Muscularis externa

17. Slot 4.17: Esophagogastric junction Note change in epithelial lining at the arrows Stomach = left; Esophagus = right Gastric pit Submucosal mucous glands Muscularis mucosae

18. Slot 4.18: Stomach (fundus and pylorus) Gastric pit Gastric glands Gastric pit Gastric glands Fundus = short pits, long glandsPylorus = deep pits, medium glands

19. Slot 4.19: Gastric glands Chief Cell Enteroendocrine Cell

20. Slot 4.20: Gastric glands Chief Cells Parietal Cells

21. Slot 4.21: Gastroduodenal junction Note change in thickness of the muscularis externa (Pylorus = right; Duodenum = left) Brunner’s Glands Crypts Villi

22. Slot 4.22: Small intestine sections Left to Right: duodenum, jejunum, ileum Duodenum with Brunner’s glands in submucosa Jejunum with thickest mucosa Ileum with Peyer’s patches in lamina propria/submucosa Brunner’s glands Peyer’s patches

23. Slot 4.23: Intestinal epithelium (simple columnar) Brush border Goblet cell

24. Slot 4.24: Duodenum (Brunner’s Glands) Brunner’s glands Crypt of Lieberkuhn

25. Slot 4.26: Meissner’s plexus/Auerbach’s plexus Muscularis mucosae Ganglion cells of Meissner’s plexus Muscularis externa Ganglion cell of Auerbach’s plexus

26. Slot 4.28: Ileum Villus Lamina propria Goblet cell

27. Slot 4.29: Appendix Crypt of Lieberkuhn Lymph nodule Submucosa Muscularis externa IC OL

28. Slot 4.30: Jejunum (blood supply) V = villi S = submucosa F = muscularis externa P = serosa Arrow = Vessels run parallel with muscle fibers in inner circular layer of M. externa

29. Slot 4.31: Small Intestine (blood supply) V = villi S = submucosa F = muscularis externa P = serosa V S F P

30. Slot 4.32: Large intestine section Intestinal crypts – note abundance of goblet cells

31. Slot 4.33: Liver section Central vein Portal system Rough outline of liver lobule

32. Slot 4.34: Liver (blood supply) Central vein Portal vein Sinusoids

33. Slot 4.35: Liver (hepatocytes and sinusoids) Endothelial cell Hepatocyte (note binucleate condition)

34. Slot 4.36: Liver (portal canals) Nerve Bile duct Portal Vein Hepatic artery Lymph vessel Bile duct Lymph vessel Hepatic artery

35. Slot 4.37: Liver section Central Vein Hepatocytes Endothelial cells

36. Slot 4.38: Gall bladder section Simple columnar epithelium Lamina propria Muscularis Adventitia

37. Slot 4.39: Jejunum Villus Crypts of Lieberkuhn Muscularis mucosae Submucosa Muscularis externa

38. Slot 2.55: Circumvallate papilla Primary papilla Secondary papilla Taste buds von Ebner’s glands

39. Slot 2.56: Taste buds (Tongue) Secondary papilla Taste buds Taste pore Taste receptor cell Sustentacular cell Basal cell

40. Slot 2.59: Fundic stomach Chief Cell Enteroendocrine Cell

41. Slot 2.60: Duodenum Brunner’s Glands Crypt Villus

42. Slot 2.61: Ileum Villus Lamina propria Goblet cell