Epithelium Tissues Functions and Locations

Simple Squamous Epithelium (Function)

protects regions where absorption or diffusion takes place or where a slick, slippery surface reduces friction

Simple Squamous Epithelium (Location)

along passageways in the kidneys, inside the eye, and at the gas exchange surfaces (alveoli) of the lungs.

Stratified Squamous Epithelium (Function)

protection from physical or chemical stresses

Stratified Squamous Epithelium (Location)

surface of the skin and line the mouth, throat, esophagus, rectum, anus, and vagina

Simple Cuboidal Epithelium (Function)

provides limited protection and occurs where secretion or absorption

takes place

Simple Cuboidal Epithelium (Location)

lines portions of the kidney tubules and thyroid gland

Stratified Cuboidal Epithelium (Function)

duct protection

Stratified Cuboidal Epithelium (Location)

ducts of sweat glands and in the larger ducts of the

mammary glands (they are rare)

Transitional Epithelium (Function)

tolerates repeated cycles of stretching without damage

Transitional Epithelium (Location)

urinary bladder, the ureters, and the urine-collecting chambers within the kidneys, where large changes in volume occur

Simple Columnar Epithelium (Function)

absorption or secretion takes place

Simple Columnar Epithelium (Location)

stomach, gallbladder uterine tubes, and ducts within kidneys

Stratified Columnar Epithelium (Function)

lines large ducts

Stratified Columnar Epithelium (Location)

lining large ducts such as those of the salivary glands or pancreas

Pseudostratified columnar epithelium (Function)

varying functions

Pseudostratified columnar epithelium (Location)

nasal cavities, the trachea (windpipe), and larger airways of the lungs and are also found along portions of the male reproductive tract

Mesothelium

lines the pericardial, pleural, and peritoneal body cavities

Endothelium

lines the inner surface of the heart and all blood vessels