1. Histology – the study of tissues
Chapter 3

2. Epithelial Tissues
Epithelial – the lining (or covering) of the body and organs
Apical surface – the exterior surface of an epithelial tissue (near the white of the slide)
Basement membrane – the lower surface of an epithelial tissue

3. Apical
Basement membrane

4. Epithelial Tissues (cont.)
Two types of layers
Simple – one layer
Stratified – more than one layer
Types of tissues:
Squamous – flat (egg shaped)
Cuboidal – cube shaped
Columnar – column shaped
Nuclei are arranged in a row

5. Epithelial Tissues (cont.)
Pseudostratified
Pseudo – false
Nuclei are scattered
Transitional – Changes or transforms from one type of tissue to another; apical cells are lobed shaped

6. Location of Epithelial Tissues
Simple squamous – capillaries and air sacs of lungs
Simple cuboidal – pancreas and ovaries
Simple columnar – stomach and intestines

7. Location of Epithelial Tissues (cont.)
Stratified squamous – outer skin, mouth, and esophagus
Stratified cuboidal – ducts of large glands
Pseudostratified – windpipe
Transitional – bladder

9. Simple Squamous

11. Stratified Squamous

18. Simple Columnar

22. Arrow – goblet cell

25. Stratified Cuboidal

27. Pseudostratified

31. Transitional