Lipids that contain 20 carbon atoms and are characterized by a five- membered ring with two side chains.
Are found in most tissues and organs, they are produced by almost all nucleated cells. Are autocrine and paracrine lipide go-between that act upon platelets, endothelium, uterine and mast cell. They are synthesized in the cell from the essential fatso acids (EFAs). Participate in a wide range of body functions such as the contraction and relaxation of smooth muscles, the dilation and constriction of blood vessel control, restraint of blood pressure, and modulation of inflammation.