Explain the excretory role of other organs.

Explanation

Lungs: Lungs remove large quantities of carbon dioxide (18 L /day) and significant quantities of water.
Liver: Liver secretes bile which contain bilirubin, biliverdin, cholesterol, steroid hormones, vitamins and drugs. These are excreted out along with the digestive wastes.
Skin: Sweat glands eliminate certain wastes like urea and lactate. Sebaceous glands eliminate sterols, hydrocarbons and waxes through serum.
Saliva: Small quantities of nitrogenous wastes are excreted through saliva.