Coordination is the process through, which two or more organs interact and complement the function of one another. The neural system provides an organized network of point to point connections for a quick coordination. But this system is short lived. As the nerve fibres do not innervate all cells of the body and the cellular functions need to be continuously regulated, a special kind of coordination and integration has to be provided. This function is carried out by hormones released by glands of endocrine system