Simple squamous
epithelium
Allows materials to
pass by diffusion and
filtration in sites
where protection
isn't important;
secretes lubricating
substances in serosae
Found in air sacs of
lungs; lining of heart,
blood vessels, and
lymphatic vessels -
Simple cuboidal
epithelium
Secretion and
absorption
Found in kidney
tubules; ducts and
secretory portions of
small glands; ovary
surfaces
, Simple columnar
epithelium
Absorption; secretion
of mucus, enzymes and
other substances;
ciliated type, propels
mucus (or reproductive
cells) by ciliary action.
Found in digestive
tract, gallbladder, and
excretory ducts of
some glands
Pseudostratified
columnar epithelium
Secretes substances,
particularly mucus;
propulsion of mucus by
ciliary action
Found in trachea and
most of the upper
respiratory tract
Stratified squamous
epithelium
Protects underlying
tissues in areas
subjected to abrasion
Found in esophagus,
mouth, and vagina
Stratified cuboidal
epithelium
Protection
Sweat glands,
mammary glands, and
salivary gland