Other Excretory Organs in Man:
1. Skin: Sweat glands are found in the human skin, which secretes out sweat containing water and some nitrogenous excretory substances.
2. Lungs: Cellular respiration release CO2 as excretory substance, which is eliminated outside by respiratory process in the lungs.
3. Liver: Liver cells convert nitrogenous part of amino acids into ammonia and then ammonia into urea. The urea is released into the blood. The liver also forms bile pigments which are excreted along with the bile juice into the intestine.
