1. Test Corrections
You are going to use your notes to make corrections to your test. This does not mean you can ask your friends the answer. You can go back through your notes and ask me questions about concepts.
You can write directly on the test because you will be able to use this to study for your fall exam.
After you are done making corrections, on the back of the test write down 3 extension questions relating to this content on the test to push you beyond this content. If you have time you can even try to answer these or make a guess.

2. You are answering these questions individually!
Go over to the lab area…
On one sticky note, answer the following question…
What is the difference between a cell and a tissue?
On your other sticky note, answer the following question…
What types of tissues are there?
You are answering these questions individually!
You have to write something, not just I don’t know. Just make a best guess.

3. Unit 2: Tissues

4. Unit 2: Tissues
Tissue: a group of cell types working together for the same purpose

5. Unit 2: Tissues
Tissue: a group of cell types working together for the same purpose
4 Types of tissues

6. Unit 2: Tissues
Tissue: a group of cell types working together for the same purpose
4 Types of tissues
Epithelial
Connective
Muscle
Nervous

8. Epithelial Tissues
Epithelial tissues cover our body surfaces, line the internal organs, and compose glands.

9. What makes epithelial tissues different from other types of tissues?
What are They?
Functions
Cover body surfaces
Cover and line internal organs
Compose glands
Protection
Secretion
Absorption
Excretion
What makes epithelial tissues different from other types of tissues?
They lack blood vessels, they readily divide, and they are packed tightly together.

10. Terms referring to the layers
Terms that help us understand what kinds of tissues we are identifying:
Terms referring to the layers
Simple = one layer
Stratified = more than one layer
Pseudostratified = false layered (appears to be more than one
layer, but only one); ciliated = with cilia
Terms referring to the cell shapes
Squamous = flat
Cuboidal = cube
Columnar = rectangular (column)
Transitional = ability to change shape

11. Apical surface
Basal surface
Simple
Apical surface
Basal surface
Stratified
Classification based on number of cell layers.

12. Squamous
Cuboidal
Columnar
Classification based on cell shape.

13. The following types of epithelial tissues are covered in this activity:
1. Simple squamous epithelial tissue (lungs)
2. Simple cuboidal epithelial tissue (kidneys)
3. Simple columnar epithelial tissue (small intestine)
4. Pseudostratified (ciliated) columnar epithelial tissue (trachea lining)
5. Stratified squamous epithelial tissue (mouth lining)
6. Stratified cuboidal epithelial tissue (salivary glands, sweat glands)
7. Stratified columnar epithelial tissue (male reproductive tract)
8 Transitional epithelial tissue (bladder)
a. The tissue may show a full bladder
b. The tissue may show an empty bladder

14. Figure 4.3a Epithelial tissues.
(a) Simple squamous epithelium
Description: Single layer of flattened
cells with disc-shaped central nuclei
and sparse cytoplasm; the simplest
of the epithelia.
Air sacs of
lung tissue
Function: Allows passage of
materials by diffusion and filtration
in sites where protection is not
important; secretes lubricating
substances in serosae.
Nuclei of
squamous
epithelial
cells
Location: Kidney glomeruli; air sacs
of lungs; lining of heart, blood
vessels, and lymphatic vessels; lining
of ventral body cavity (serosae).
Very easily damaged; replaced quickly.
Photomicrograph: Simple squamous epithelium
forming part of the alveolar (air sac) walls (125x).

15. Figure 4.3b Epithelial tissues.
(b) Simple cuboidal epithelium
Description: Single layer of
cubelike cells with large,
spherical central nuclei.
Simple
cuboidal
epithelial
cells
Function: Secretion and
absorption.
Basement
membrane
Location: Kidney tubules;
ducts and secretory portions
of small glands; ovary surface.
Thicker than simple squamous epithelium. Why? (Think about function)
Connective
tissue
Photomicrograph: Simple cuboidal
epithelium in kidney tubules (430x).

16. Figure 4.3c Epithelial tissues.
(c) Simple columnar epithelium
Description: Single layer of tall cells
with round to oval nuclei; some cells
bear cilia; layer may contain mucus-
secreting unicellular glands (goblet cells).
Simple
columnar
epithelial
cell
Function: Absorption; secretion of
mucus, enzymes, and other substances;
ciliated type propels mucus (or
reproductive cells) by ciliary action.
Location: Nonciliated type lines most of
the digestive tract (stomach to anal canal),
gallbladder, and excretory ducts of some
glands; ciliated variety lines small
bronchi, uterine tubes, and some regions
of the uterus.
Basement
membrane
Photomicrograph: Simple columnar epithelium
of the stomach mucosa (860X).

17. Figure 4.3d Epithelial tissues.
(d) Pseudostratified columnar epithelium
Description: Single layer of cells of
differing heights, some not reaching
the free surface; nuclei seen at
different levels; may contain mucus-
secreting cells and bear cilia.
Cilia
Mucus of
mucous cell
Pseudo-
stratified
epithelial
layer
Function: Secretion, particularly of
mucus; propulsion of mucus by
ciliary action.
Location: Nonciliated type in male’s
sperm-carrying ducts and ducts of
large glands; ciliated variety lines
the trachea, most of the upper
respiratory tract.
Basement
membrane
Photomicrograph: Pseudostratified ciliated
columnar epithelium lining the human trachea (570x).
Trachea

19. Given the previous examples (consider the morphology only)
Can you name?
First, the tissue type
Second, where in the body the tissue is found

20. What kind of tissue does this represent?
Simple squamous epithelial tissue
Where in the body would you find this tissue?
lungs

21. Simple squamous epithelial tissue (superior view)
What kind of tissue does this represent?
Simple squamous epithelial tissue (superior view)

22. What kind of tissue does this represent?
Simple cuboidal epithelial tissue
Where in the body would you find this tissue?
Kidneys (tubules)
The lining of the kidney glomerulus (sing.)/glomeruli (pl.) is simple squamous epithelial tissue

23. What kind of tissue does this represent?
Simple columnar epithelial tissue
Where in the body would you find this tissue?
small intestine

24. What kind of tissue does this represent?
Pseudostratified (ciliated) columnar epithelial tissue
“false layered”; it looks like more than one layer, but it is not
Where in the body would you find this tissue?
trachea lining

25. Take out your tissue coloring sheet
See how many of these tissues you can identify based on your notes from class today!

26. Sticky note corrections
In your groups you will go up and see what sticky notes you would remove first and place them on the right side of the board.
After you are done, I want you to sit back down and the next group will go up and see which ones they want to change.