A. Mechanisms in pollution For the physiologist"the poison becomes an instrument which dissociates and analyses the most delicate phenomena of living structures, and by attending carefully to their mechanism in causing death, he can learn indirectly much about the physiological processes of life such studies of the effects produced by toxic substance demand a multi-disciplinary approach (-----Claude bernardA. Mechanisms in pollution For the physiologist “ the poison becomes an instrument which dissociates and analyses the most delicate phenomena of living structures, and by attending carefully to their mechanism in causing death, he can learn indirectly much about the physiological processes of life” ……such studies of the effects produced by toxic substance demand a multi-disciplinary approach. (------ Claude Bernard )