Owl Monkey Kidney Epithelial Cells (OMK Line)
Epithelial cells vary in shape, and in vivo the cells are found tightly packed into sheets containing very little intercellular material. Tight junctions generally bind the cells together, effectively forming a protective barrier that shields organs or other bodily components from physical injury and invasion by foreign materials. Epithelial sheets also are important in the prevention of fluid loss and generally consist of renewing cell populations that display periodic mitotic activity, which is necessary to maintain the integrity of the tissue since most epithelia are continually exposed to mechanical abrasion. In addition to protection, epithelial cells may function in absorption, sensory reception, and secretion. Renal epithelial cells often are particularly notable for this latter function, playing a key role in the temporary storage and subsequent secretion of waste products.