Madin-Darby Canine Kidney Epithelial Cells (MDCK Line)

In the body, epithelial cells are organized into contiguous sheets. Specialized junctions known as tight junctions bind the cells closely together and allow them to collectively serve as a barrier that prevents the diffusion of most molecules. Epithelial cells function in a variety of other ways as well, including secretion, absorption, and protection from abrasion. The specific tasks carried out by particular cells are somewhat dependent on their location in the body. Epithelial cells in the kidneys, for instance, are involved in the storage and secretion of bodily wastes.