1. Epithelial Tissue Types: Simple Squamous Epithelium: Location:
Lines air sacs (alveoli) in lungs
Forms walls of capillaries
Lines inside of blood and lymph vessels
Covers membranes that line body cavities.
Description:
Single layer of thin, flattened cells that fit tightly together.
Function:
Allow diffusion and filtration (Ex. CO2 and O2 are exchanged)

2. 2. Simple cubiodal epithelium:
Location:
Lines the follicles of the thyroid gland
Covers the ovaries
Lines the kidney’s tubules and ducts of certain glands
(salivary, pancreas and liver)
2. Description:
Single layer of cubed-shaped cells.
3. Function:
Kidneys – Tubular secretion and tubular absorption
Glands – Secretes glandular products (hormones, saliva, etc)

3. 3. Simple Columnar Epithelium:
Location:
Ciliated – Uterine tube / Fallopian tubes
Non-ciliated – Lines uterus and portions of the digestive tract (stomach, small and large intestine)
2. Description:
Single layer of elongated cells.
3. Function:
Ciliated – Helps move egg cell through the Fallopian tubes
Non-ciliated – Protects underlying tissues, Secretes digestive juices and absorbs nutrients from digested food.

4. Pseudostratified Epithelium
Location:
Line passages of the respiratory system
2. Description:
Two or more levels in a row of aligned cells.
Gives the illusion of multiple layers of cells.
3. Function:
Sticky and trap dust and microorganisms.
Cilia move mucus and captures pesticides out of
airways.

5. Stratified Squamous Epithelium:
Location:
Outermost layer of skin
Lines the oral cavity, esophagus, vagina and anal canal.
2. Description: Many layers of cells.
3. Function:
Prevents water and other substances from escaping
underlying tissues
Blocks chemicals and microorganisms from entering.

6. Transitional epithelium:
Location:
Inner lining of urinary bladder, lines the ureters and part of the urethra.
2. Description:
Cells can contract – several layers look cuboidal
Outer borders of cells on free surface seem ‘scalloped’ (rounded)
Tissue can stretch
3. Function:
Forms barrier that helps prevent the contents of the urinary tract
from diffusing back into the internal environment.

7. Questions – See ‘Tissue activity on notes ppt’
2. Matching: C D B A E F
3. E

8. 4. D C B A F E
5. Non-living layer that anchors the epithelial tissue to
the connective tissue.
6. B