Covering epithelium: simple epithelium

 There are two logic in classification of covering epithelium
1st : arrangement of cells :
single cellular layer known as simple epithelium

Multiple cellular layer known as stratified epithelium

2nd logic : shape of cells
There are three types of cells
flat cells : squamous
cuboidal cells
columnar cells

so, you can make three types of simple epithelium
1. simple squamous epithelium
2. simple cuboidal epithelium
3. simple columar epithelium
Another simple epithelium is pseudo-stratified ciliated columnar epithelium
Pseudo means false
it looks like multilayered epithelium but it is a simple epithelium
cells are arranged in single layer but size of cell different
some are tall
some are short
 Location of nuclei of cells are in different position so it looks like multilayer epithelium but it is nothing but simple epithelium

finally we find four typres of simple covering epithelium