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 Pg. 56 of book and page 12-14 of packet

2. Classification of Epithelia 1. Number of cell layers

3. 2. Shape of the cells 2. Shape of the cells

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

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

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

9. Simple Squamous Epithelium L L L L L L

10. Simple Cuboidal Epithelia Kidney Tubules Kidney Tubules

11. Apical surface

12. Simple Cuboidal Epithelium L L L

13. Cross Section through the Small Intestine Lumen

14. Simple Columnar Epithelium Apical surface Basement membrane Connective Tissue

15. Simple Columnar Epithelium L L L Lumen

16. Stratified Squamous Epithelia Skin

17. Apical surface Lumen

18. LUMEN Stratified Squamous Epithelium

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

22. Pseudostratified Ciliated Columnar Epithelium Cilia LUMEN

23. Transitional Epithelia Urinary Bladder Lumen

25. LUMEN Transitional Epithelium

26. PRACTICE TIME! Let’s see how you do!

27. Name this tissue.

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

29. Name this tissue

30. 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?

31. Name this tissue

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

33. Name this tissue

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

35. Name this tissue.

36. Simple Squamous Epithelium (again!)

37. Name this tissue

38. Simple Columnar Epithelium Can you see the goblet cell? What do they make?

39. Name this tissue.

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

41. Epithelia Image Gallery

42. Simple Squamous Epithelia

44. Simple Cuboidal Epithelia

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

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

49. Simple Columnar Epithelia

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

52. Stratified Squamous Epithelia

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

55. Pseudostratified Ciliated Columnar Epithelia

58. Transitional Epithelia: pointer is on the basement membrane

60. Transitional Epithelia