Simple squamous epithelium - Simple squamous epithelium, isolated

Glandular epithelium is specialized for secretion Glandular epithelium forms more-or-less complex invaginations of epithelial tissue that lie deep to the surface epithelium lining obvious external and internal body surfaces.

Ciliated columnar epithelium is composed of simple columnar epithelial cells with cilia on their apical surfaces.

Simple cuboidal epithelia are observed in the lining of the kidney tubules and in the ducts of glands.

These common features confer a characteristic appearance upon most epithelial tissues, no matter how various their cells may be.