Columnar epithelia are epithelial cells whose heights are at least four times their width. Columnar epithelia are divided into simple (or unilayered), and stratified (or multi-layered).
Simple squamous epithelium (Endothelium, Mesothelium)
Simple cuboidal epithelium
Simple columnar epithelium
Pseudostratified columnar epithelium (Respiratory epithelium)
Stratified squamous epithelium
Stratified cuboidal epithelium
Stratified columnar epithelium
Myoepithelial cell · Serous demilune