Which of the following organs do not excrete nitrogenous waste products?
Lungs
Liver
Nitrogenous waste products include urea, uric acid, and creatinine which are excreted as urine and sweat by the kidneys and the sweat glands respectively. Lungs and liver do not excrete nitrogenous wastes. Lungs excrete water as water vapor and carbon dioxide along with expired air. Liver excretes bile pigments through the intestine.