Respiration is a physiological process by which organisms exchange gases (especially intake of oxygen and releases of carbon-di-oxide),with the environment. This process is also known as external respiration. On the other hand, internal or cellular respiration means the oxidation of
Introduction to endocrine glands of fishes
The glands that secrete their products into the bloodstream and body tissues along with the central nervous system to control and regulate many kinds of body functions are known as endocrine gland. In fishes various endocrine gland has been found