1. Epithelial Tissue (pg 2)

2. Tissue = collection of cells that have similar structure and function together as a unit

3. Tissue = collection of cells that have similar structure and function together as a unit
Histology = Study of tissues

4. Epithelial Tissues
Form the covering of all body surfaces, line body cavities and organs, and form glands

5. Epithelial Tissues
Form the covering of all body surfaces, line body cavities and organs, and form glands
Cells are tightly packed

6. Epithelial Tissues
Form the covering of all body surfaces, line body cavities and organs, and form glands
Cells are tightly packed
One free surface

7. Epithelial Tissues
Form the covering of all body surfaces, line body cavities and organs, and form glands
Tightly packed
One free surface
Avascular (no blood vessels)

8. Epithelial Tissues
Form the covering of all body surfaces, line body cavities and organs, and form glands
Tightly packed
One free surface
Avascular (no blood vessels)
Regenerate quickly

9. Shapes
1. Squamous = flat cells, thin nuclei

10. Shapes Squamous = flat cells, thin nuclei
Cuboidal = cubelike cells, spherical central nuclei

11. Shapes Squamous = flat cells, thin nuclei
Cuboidal = cubelike cells, spherical central nuclei
Columnar = Tall narrow
cells, nuclei near bottom

12. Number of Layers
Simple = 1 layer

13. Number of Layers Simple = 1 layer
Stratified = Multiple layers of cells. Named according to the type of cells at the free surface of the tissue

14. Number of Layers Simple = 1 layer
Stratified = Multiple layers of cells. Named according to the type of cells at the free surface of the tissue
Pseudostratified = appears to be multiple layers, but is really only 1 layer

16. Glandular Epithelium
Exocrine glands = secrete products onto a surface via a duct

17. Glandular Epithelium
Exocrine glands = secrete products onto a surface via a duct
Can be unicellular (goblet cells) or multicellular

18. Exocrine Glands Classified according to STRUCTURE
1. Simple: duct has no branches
2. Compound: duct has branches

19. Exocrine Glands Classified according to STRUCTURE
1. Simple: duct has no branches
2. Compound: duct has branches
3. Tubular: gland has the same diameter as the duct
4. Acinar (Alveolar): gland is saclike

21. Exocrine Glands Classified according to SECRETIONS
1. Merocrine: fluid released by exocytosis
Example: salivary and pancreatic glands

22. Exocrine Glands Classified according to SECRETIONS
1. Merocrine: fluid released by exocytosis
Example: salivary and pancreatic glands
2. Apocrine: small portion of cell is pinched off
Example: Mammary glands

23. Exocrine Glands Classified according to SECRETIONS
1. Merocrine: fluid released by exocytosis
Example: salivary and pancreatic glands
2. Apocrine: small portion of cell is pinched off
Example: Mammary glands
3. Holocrine: Cells fill with product and rupture
Example: Sebaceous (oil) glands

24. 1st Period: 8:40-9:40
2nd Period: 9:45-10:45
3rd Period: 10:50-11:50
LUNCH: 11:50-12:24
4th Period: 12:30-1:30
ASSEMBLY: 1:35-2:25
5th Period: 2:30-3:30