| A | B |
|---|
| Single layer of flattened cells | Simple squamous |
| One layer of cube shaped cells | Simple cuboidal |
| One layer of tall cells that fit closely together | Simple columnar |
| One layer of cells that appears as two | Pseudostratified columnar |
| Several layers of cells, those closest to the surface are squamous, those nearer the bottom are cuboidal or columnar | Stratified squamous |
| Several layers of cells, capable of stretching | Transitional |
| Two cell layers with at least the surface layer cuboidal in shape | Stratified cuboidal |
| Several layers of cells, surface cells are columnar and basal cells vary | Stratified columnar |
