1. Composed of cells found close together (very little tissue fluid ound between them) 2. Cells fit tight together (held together by tight junctionsand desmosomes to form an uninterrupted layer of cells that lines nearly every external and internal body surface. 3. Always has ONE surface exposed to the exterior of the body or to the internal surface of a body cavity or organ. 4. basal surface 5. avascular, 6. well supplied with nerve fibers, 7.regenerate rapidly by mitosis.