1. Lab Exercise Classification of Tissues: Epithelial Tissue
Tissue: a collection of similar cells working together
Epithelial Tissue: cells that line the cavities and surfaces of organs & structures

2. Classification of Epithelia
1. Number of cell layers

3. 2. Shape of the cells

4. Lumen: The open space above the apical surface of a structure
Epithelial Tissue
Connective Tissue
Basement Membrane

5. Lumen: The inner open space or cavity of a tubular organ, as of a blood vessel or an intestine.
Apical Surface
Connective
Tissue
LUMEN
Epithelial
Tissue
Basement Membrane

6. I will use BOTH microscopes AND diagrams to test you on epithelial tissues. Make sure you look at the microscopes in lab and the diagrams in this presentation.

7. Simple Squamous Epithelia Alveoli (air sacs) of Lungs

8. Simple Squamous Epithelium

10. Simple Cuboidal Epithelia Kidney Tubules

12. Simple Cuboidal Epithelium

13. Cross Section through the Small Intestine
Lumen

14. Simple Columnar Epithelium

15. Stratified Squamous Epithelia Skin

16. Stratified Squamous Epithelium
LUMEN

18. Pseudostratified Ciliated Columnar Epithelia Trachea (cross section)
Lumen

19. Pseudostratified Ciliated Columnar Epithelium
LUMEN
Cilia

21. Transitional Epithelia Urinary Bladder
Lumen
Lumen

22. Transitional Epithelium
LUMEN

24. Name this tissue.

25. Simple Cuboidal Epithelium
Found where? Can you identify the lumen? Apical and basement membrane?

26. Name this tissue

27. Stratified Squamous Epithelium
Where in the body is this found? Can you find the lumen/apical surface/basement membrane? What is found under the basement membrane?

28. Name this tissue

29. Transitional Epithelium
Where can you find this in the body?

30. Name this tissue.

31. Simple Squamous Epithelium
Note it’s just ONE layer of flat shaped cells! Where in the body do you find this epithelium?

32. Name this tissue.

33. Simple Squamous Epithelium (again!)

34. Name this tissue

35. Simple Columnar Epithelium
The cells labeled “G” are goblet cells. What do they make?

36. Name this tissue.

37. Pseudostratified Ciliated Columnar Epithelium
Do you see the cilia? Where in the body can you find this epithelium?

38. Name this tissue

39. Simple Squamous Epithelia
Found in the alveoli of lungs, walls of capillaries

40. Epithelia Image Gallery

41. Simple Squamous Epithelia

42. Simple Squamous Epithelia

43. Simple Cuboidal Epithelia

44. Simple Cuboidal Epithelia

45. Simple Cuboidal Epithelia

46. Simple Columnar Epithelia: pointer is on the basement membrane

47. Simple Columnar Epithelia: pointer is on a goblet cell

48. Simple Columnar Epithelia

49. Simple Columnar Epithelia

50. Stratified Squamous Epithelia: pointer is on the basement membrane

51. Stratified Squamous Epithelia: pointer is on the basement membrane

52. Stratified Squamous Epithelia

53. Stratified Squamous Epithelia

54. Stratified Squamous Epithelia

55. Pseudostratified Ciliated Columnar Epithelia: pointer is on the basement membrane

56. Pseudostratified Ciliated Columnar Epithelia

57. Pseudostratified Ciliated Columnar Epithelia

58. Pseudostratified Ciliated Columnar Epithelia

59. Transitional Epithelia: pointer is on the basement membrane

60. Transitional Epithelia: pointer is on the basement membrane

61. Transitional Epithelia

62. Transitional Epithelia