2. THE EPITHELIAL TISSUE
Amal almuhanna

3. Types of Epithelia Covering “surface” epithelium.
Glandular epithelium.
Neuro_epithium.
simple
Stratified

4. Surface “Covering” Epithelium :
Simple
Squamous, cuboidal, columnar
Stratified
Str. Squamous
Str. Cuboida
Str. columnar
Pseudostratified
Pseudostratified columnar

5. Simple Epithelium : Consists of a single layer of cells, with each
layer extending from basement membrane to free surface, ± microvilli.
Squamous
cuboidal
columnar

6. Simple Epithelium

7. Stratified Epithelium:
Consists of more than one layer of cells, only one of which is attached to the basement membrane.
Types:
Squamous cuboidal columnar

8. Stratified Sq. Epithelium

9. Stratified cuboidal Epithelium:

10. Stratified Col. Epithelium:

11. Transitional Epithelium:
Stratified cells that appear cuboidal when the organ or tube is not stretched and squamous when the organ or tube is stretched by fluid.

12. Transitional Epithelium:

13. Pseudo Stratified Epithelium:
Single layer of cells: some tall and thin and reach the free surface + small basal cells .
Nuclei are at different levels (appear stratified).
Cells are almost always ciliated (associated with goblet cells).

14. Pseudostratified Epithelium:

15. Classification of Glandular Epithelium:
According to :
Number of cells.
Unicellular & multicellular.
Struture of the gland.
Simple &branched
Mode of secretion.
Exocrine & endocrine.
Type of secretion.
Serous,mucous etc..
Cllular changes after secrtion.
Merocine , apocrine and holocrine.

16. Exocrine Glands
Unicellular

17. Multicellular Exocrine Glands:

18. Thank you
for listening to me..