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Epithelium and Junctions Epithelium and Junctions

Epithelium and Junctions - PowerPoint Presentation

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Epithelium and Junctions - PPT Presentation

VIBS 443602 EM 3 region of basal lamina and connective tissue beneath intestinal epithelial absorptive cells Plasma membrane Basal lamina Connective tissue EM 17 capillary in the lamina propria of the intestine duodenum 13500x ID: 1047096

monkey cells skin zonula cells monkey zonula skin cell muscle occludens junction ileum epithelium vessel absorptive transitional trachea region

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1. Epithelium and JunctionsVIBS 443/602

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4. EM 3: region of basal lamina and connective tissue beneath intestinal epithelial absorptive cellsPlasma membraneBasal laminaConnective tissue

5. EM 17; capillary in the lamina propria of the intestine (duodenum); 13,500xSmooth muscle cellCapillaryEndothelial cell

6. Renin granules in Kidney (PAS) 258

7. Ileum, monkey (PAS) 249

8. Trachea, monkey 133

9. Esophagus and trachea, monkey – glands in trachea 242

10. Larynx (Gallego's stain) 429

11. 429

12. SPECIALIZATION OF EPITHELIA MAINTAIN EXTENSIVE CONTACTS AMONG CELLS STRUCTURALLY AND FUNCTIONALLY POLARIZED JUNCTIONSZONULA OCCLUDENS - TIGHT JUNCTION (BELT)ZONULA ADHERENS – ADHERING BELTDESMOSOME (MACULA ADHERENS) - SPOT ATTACHMENTGAP JUNCTIONS - COMMUNICATION

13. Terminal bars

14. 32409

15. EM 6b: Region showing zonula occludens, zonula adherents, and macula adherents junctions between cells.Zonula occludensZonula adherensDesmosomeEM 6b

16. EM 6b

17. EM 6c

18. EM 4: Continuity between junctional complex and terminal webTerminal webInterdigitation of plasma membraneTerminal bar

19. EM 4a: Ridges and grooves of zonula occludens visualized by freeze cleave microscopy1. Zonula occludens

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21. Inside the cell Outside the cellP = Protoplasmic side E = Ectoplasmic side

22. EM 4a

23. EM 2a: Particles and pits of gap junction visualized by freeze cleave microscopy1. Gap junction

24. EM 2a

25. Triad with bile duct Liver & spleen with colloidal carbon, rat118

26. EM 2: portion of two cells including gap junctionDesmosomeGap junctionRough endoplasmic reticulum

27. absorptive cells of Ileum, monkey 250

28. Ileum, monkey (PAS) 249

29. argentaffin cells of Ileum, monkey 250

30. Large intestine or Colon, monkey153

31. EM 4c: intestinal absorptive cell (super nuclear region); 60,000xBudding RERCoated vesicleGolgiMitochondriaNucleusPlasma membranePrimary lysosome

32. Endothelial cells lining small blood vessel lumen with smooth muscle cells and fibrolasts in the vessel wall.LumenEndothelial cellFibrolast

33. EM 10a: Endothelial cells lining capillary with pericyte in the vessel wall.LumenEndothelial cellTight junction

34. Skeletal muscle in spermatic cord UT 196196

35. UT196 valves in large vein of spermatic cord34456

36. EM 10f: arteriolar wall; 30,000xApical caeolaeCollagenDense bodiesElastic fiberEndothelial cellNuclear poreRER

37. EM 8h: macrophage in testis; 30,000x.Enlarged basal laminaHeterophagic vacuoleLeydig cell cytoplasmNucleolusMyoid cell

38. Skin abdomen 206

39. Skin, scalp 209

40. Skin hand monkey109

41. Skin hand monkey109

42. Skin 111

43. Skin, foot 408

44. Vagina 178

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46. 109

47. EM 8g: epidermis; 7,000x. Note desmosomal connections between cellsKeratinocyteDesmosomeMelanocyte

48. EM 16: surface mucosa of stomach; 13,500xGranules of surface mucous cellsMitochondriaNucleiLumen

49. Urinary bladder, monkey 160

50. Ureter – transitional epithelium and smooth muscle 262

51. Penis – transitional epithelium and surrounding spongy cavernous of penal urethra277

52. Penis - transitional epithelium of penal urethra 277

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