Surface layer of cells closely bound to one another to form continuous sheets covering surfaces that may come into contact with foreign substances.
in PC the cells within the prostate that line the ducts and functionally secrete chemicals such as PSA into the blood stream or into the duct openings or lumen
one of the closely packed cells forming the epithelium
One of the closely packed cells in a thin layer that covers the internal and external surfaces of the body, including body cavities, ducts and vessels