Pseudo stratified epithelium type of epithelium the nuclei, lie at different levels giving it a stratified appearance.
All the cells reach the basement membrane but not all of them extend to the surface. Those reaching the surface are columnar with one or more processes extending to the basement membrane.
Between these are ovoid or spindle shaped Basal cells, which also reach the basement membrane.
This is type of epithelium is usually ciliated (motile or stereo cilia), the cilia being present on the free surface of the columnar cells.
This epithelium occurs mainly in the lining passages of the respiratory and male reproductive systems.
