found in the lungs, lining of heart and blood vessels, kidney, and external covering around the organs; function: it's thin so it allows for easy diffusion and filtration. Also reduces friction.
found in the nasal cavity, trachea, bronchi, and portions of the male reproductive tract; function: protection and secretion
surface of skin; found in the lining of mouth, throat, esophagus, rectum, anus and vagina; function: provides physical protection against abrasion, pahtogens, and chemical attack.
found in the lining of some ducts (rare); function: protection, secretion and absorption
found in small areas of the pharynx, epiglottis, anus, mammary gland, salivary ducts and urethra; funtion: protection