Simple SquamousFound: Air Sacs, simple diffusion

Simple CuboidalFound: Kidneys & GlandsSecretion & Absorption

Simple ColumnarFound: trachea, small intestine

Basement membrane, with nucleus near bottom

Pseudostratified ColumnarFound: lining air passageways

Multiple layers of column cells, varying heights

Stratified SquamousFound: skin, esophagus, mouth, vagina

Surface exposed to wear & tear, protects underlying cells

Stratified TransitionalFound: Bladder, hollow organs under stress

Changes from squamous to cube, thick layer to prevent diffusing