1. Epithelial Tissue Notes
9/26/2017

2. Bellwork 9/26
Complete the following on the back of your Tissue notes from yesterday’s class without your book or notes:
What is a group of cells with the same function called?
Copy the chart and Identify the overall function of the following tissues types:
Tissue type
Functions
Epithelial
Control
Connective
B. Covering
Muscle
C. Movement
Nervous
D. Support

3. Announcements Word Parts #3 Quiz Tomorrow
Epithelial, Muscle and Nervous Tissue Quiz on Th/F
Cancer Flyer is now Late

4. Agenda 9/26 Learning Goal: Essential Question:
What are the structure, function and location of epithelial tissues?
Discuss project
Review Epithelial Tissues
Practice Tissues
Start Project
HW: Reading Notes on Muscle and Nervous Tissue
Learning Goal:
Identify and classify epithelial tissues based on their structure, function and location

5. Histology Project Access in Google Classroom Due next Friday!
Worth a Test Grade

6. Epithelial Tissue
Function
Protection
Secretion
Excretion
Absorption

7. Covering body surfaces Covering and lining internal organs
Epithelial Tissue
Location
Covering body surfaces
Covering and lining internal organs
Makes up glands
This picture will help you with your homework.

8. Epithelial Tissue
Distinguishing Characteristics
Tightly packed cells
Lack of blood vessels
Free surface
Basement membrane
Readily divide

9. How to identify epithelial tissue
One side is always exposed. This is called the FREE SURFACE. The non-free surface is attached to underlying connective tissue called the BASEMENT MEMBRANE. The cells are tightly packed together so they have very little MATRIX. (Matrix is the material between each cell.) Very few blood vessels are found in epithelial tissue.

10. Knowledge check
Is it epithelial? No
YES

11. Identify the basement membrane Identify the free surface

12. How to classify epithelial tissue
*Note- there is only one layer between the basement membrane and free surface
By the number of layers
a. Simple= 1 layer
Free surface
Basement membrane
Free surface

13. 1b. Stratified = more than 1 layers
Where is the basement membrane?
Where is the free surface?
Is there more than 1 layer in between?
Free surface
Basement membrane

14. 1c. Pseudostratified = appears layered because nuclei are on different levels, not truly layered
There is only one layer between the basement membrane and free surface but the cells are so tightly packed the nuclei overlap.
Free surface
Basement
membrane

15. How to classify epithelial tissue
2. By the shape
Squamous Cuboidal Columnar Transitional

16. Knowledge check What shape is it? Squamous Columnar Cuboidal
This is stratified squamous

17. How to identify epithelial tissue
3. If they have cilia or not

18. How to identify epithelial tissue
4. If they are keratinized or not.
Keratinized
Cells are dead at surface, noted by lack of nuclei
Cells are living,
Note the nucleus in every cell

19. Use the key to identify epithelial tissue
Continue until you come to a dead end.