Extra water, excessive salts and nitrogenous wastes are removed from the body by the:
Excretory system
The excretory system is the system of an organism's body that performs the function of excretion, the bodily process of discharging wastes. The excretory system is responsible for the elimination of wastes produced. There are several parts of the body that are involved in this process, such as sweat glands, the liver, the lungs and the kidney system.