1. Challenge Problem- from a week ago
1. Identify the type of cells that receive and transmit information.
2. These cells are very useful if you go without eating for a long time.
3. Name the 2 types of cells for reproduction.
4. Describe the difference between active transport and facilitated diffusion.
5. Get a note packet from the front.

2. Tissues: Epithelial Tissue
Chapter 3b

3. Body Tissues Cells are specialized for particular functions Tissues
Groups of cells with similar structure and function
Four primary types
Epithelium
Connective tissue
Nervous tissue
Muscle
Slide 3.41
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

4. Epithelial Tissues Found in different areas Functions Body coverings
Body linings
Glandular tissue
Functions
Protection
Absorption
Filtration
Secretion
Slide 3.42
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

5. Epithelium Characteristics
Cells fit closely together
Tissue layer always has one free surface
The lower surface is bound by a basement membrane
Avascular (have no blood supply)
Regenerate easily if well nourished
Slide 3.43
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

6. Classification of Epithelium
Number of cell layers
Simple – one layer
Stratified – more than one layer
Figure 3.16a
Slide 3.44a
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

7. Classification of Epithelium
Shape of cells
Squamous – flattened
Cuboidal – cube-shaped
Columnar – column-like
Figure 3.16b
Slide 3.44b
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

8. Simple Epithelium Simple squamous Single layer of flat cells
Usually forms membranes
Lines body cavities
Lines lungs and capillaries
Figure 3.17a
Slide 3.45
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

10. Simple Epithelium Simple cuboidal Single layer of cube-like cells
Common in glands and their ducts
Forms walls of kidney tubules
Covers the ovaries
Figure 3.17b
Slide 3.46
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

12. Simple Epithelium Simple columnar Single layer of tall cells
Often includes goblet cells, which produce mucus
Lines digestive tract
Figure 3.17c
Slide 3.47
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

14. Simple Epithelium Pseudostratified
Single layer, but some cells are shorter than others
Often looks like a double cell layer
Sometimes ciliated, such as in the respiratory tract
May function in absorption or secretion
Figure 3.17d
Slide 3.48
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

16. Stratified Epithelium
Stratified squamous
Cells at the free edge are flattened
Found as a protective covering where friction is common
Locations
Skin
Mouth
Esophagus
Figure 3.17e
Slide 3.49
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

18. Stratified Epithelium
Stratified cuboidal
Two layers of cuboidal cells
Stratified columnar
Surface cells are columnar, cells underneath vary in size and shape
Stratified cuboidal and columnar
Rare in human body
Found mainly in ducts of large glands
Slide 3.50
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

19. Stratified Epithelium
Transitional epithelium
Shape of cells depends upon the amount of stretching
Lines organs of the urinary system
Figure 3.17f
Slide 3.51
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

20. Quick Quiz What kind of epithelial tissue lines body cavities?
Simple squamous
What kind of epithelial tissue is found in the mouth, skin, and esophagus?
Stratified Squamous
If an epithelial tissue has many layers of squamous cells, how would we catagorize it?

21. Challenge Problem
1. First person/people to your desk get the following
For each person Epithelial Tissue Note Sheet
For each person Epithelial Worksheet (has big blank boxes on it)
For entire group of 2-4  4 different papers with different shapes on them
They are in order in the metal bin

22. Epithelial Modeling Color the different shapes different colors
Draw and color a basement membrane for each tissue types
Draw a nucleus
Make sure the pieces fit TIGHTLY together!
Label the parts/layers of the epithelial tissue
When everyone at your table is finished with each tissue type I will stamp your papers

23. Challenge problem- collecting
1. This type of tissue lines body cavities and lungs.
2. Describe the layers and shape of the following tissues.
Simple columnar
Stratified squamous
Pseudostratified columnar
3. Identify the types of tissue we find in our airways that have cilia on them that remove junk from those airways.
4. A type of tissue that we can find in our digestive tracts that secrete mucus and also absorb nutrients is ___________ ___________.

24. Clean Up 1 scraps of paper in the trash
2 Keep the cell-shaped paper at your desk
3. I will collect your Epithelial Tissue Worksheet (the one you glued)

25. Turn in your Epithelium Worksheet
Once directed
Get 1 microscope per pair
Make sure it is on Low power and lights off
Put a paper towel down
Get 1-2 slides from me

26. Examining Epithelial Tissue- Do This Now
Get ‘Examining Epithelial Tissue’ lab from the front
Read the FLT and all the instructions for the lab
Once directed
Get 1 microscope per pair
Make sure it is on Low power and lights off
Put a paper towel down
Get 1-2 slides from me and set on paper towel
Microscope Review
Complete Observations

27. Microscope Review Always start Low Power (short lens) and lights off
When on High power ONLY USE FINE FOCUS KNOB
When finished put Low Power, remove slide, organize desk

28. Challenge Problem- Get out your review sheets
1. Identify the tissues
to the right and below

29. Challenge Problem
Identify the tissue to the 
right and below

30. Challenge Problem- get out your Epithelial Tiss Lab
Exam 2 results
Period
Review Completion
# A’s
Avg Score on Exam 3
83.3% 4
30.0
68.2% 5
92% !!
30.4
69.2% 7
73.1% 2
29.3
66.7%

31. Complete Epithelial Tissue Obs
Think about the table at which you left off
Go to the next set of slides NOW.
10 min each to make last observations

32. CSA #1 Chapters 1-3 10 minutes to review
You can quiz each other with your 3x5 cards
You can add stuff to it by using the book or notes, but not your neighbor’s note card
If you make one, use a ruler and scissors to create a 3” by 5” card
Only have 10 minutes