Epithelium Web Lab

Epithelium Web Lab

A. Squamous Epithelium

1. Isolated Squamous Epithelial Cells in face view (Cheek Cells) Draw one Squamous epithelium cell on high power and label the nucleus, cytoplasm and cell membrane,. Be sure to label the magnification.

*low power
*medium power
*high power

2. Simple Squamous Epithelium (cross section/transverse)

These slides will show a cross section of the small intestine. You will specifically be looking at the lining of the small intestine.

In order for you to locate the simple squamous epithelial, you must picture

what it will look like. Think: simple refers to ______, squamous

refers to ______and epithelial would be found ______.

Now, look at the high power human intestine cross section. Locate the

simple squamous epithelium.

a. lining of the small intestine
high power (human)

Draw four simple squamous cells. Why do the simple squamous cells from

the cheek and the cells from the intestine look different?

______
b. Tubes found in the kidney
*medium power

What are the white areas present on the slide? ______

Why would this be a great place to find epithelial cells?______

Go to high power. Draw 4 simple squamous cells as seen in the picture and label the

nucleus, the apical surface and the basal surface.

3.Stratified Squamous Epithelium

Remember: Use the name to determine the shape and layering before looking at the slides.

a. in demo slide of skin
low powermedium power high power 2nd view

On the next page, draw a piece of stratified squamous on high power. Label the apical surface and the basal surface. Give it a title and don’t forget the magnification.

4-7 On the next page do not need to be drawn. Make sure you understand the photos.

4. Simple Cuboidal Epithelium

What do you expect the cells appearance to be when you look at this slide?

a. Tubes found in the kidney

*medium power xs Find the cells here.
*high power xs Look at them here. Think about the apical surface and basal surface.
*high power xs - labeled Check your thoughts here.

b. Thyroid gland follicles (these follicles contain hormone and therefore the openings will not be white like in the others.
* medium power
* high power labeled
We will not be looking at stratified cuboidal until later. What would you expect the difference to be between the simple cuboidal epithelium and the stratified cuboidal tissue?

______

5. Simple Columnar Epithelium (intestine section)
*medium power (also same shot as simple squamous - visceral peritoneum)
*high powerCan you locate the apical surface and the basal surface? The cell membrane and nucleus of one columnar cell?

Notice the basement membrane.
*oil immersionCheck your answers here.

6. Pseudostratified Ciliated Columnar Epithelium (Look at the name, what will you expect to see here)
* low power
*medium power
*medium power 2nd view
*high power labeled
*high power 2nd view

7. Transitional Epithelium
*high power
Look at the 5 characteristics of Epithelial Tissue.

Do these slides all show these characteristics?

Name the 5 characteristics.(Use your notes or your book)

1.

2.

3.

4.

5.

For more practice, take a look at these. Are you ready for the microscope?