Question

What is the main nitrogenous waste in human beings?

Answer 1

1. Human beings are ureotelic animals. They excrete mainly urea eliminated via the urine.
2. Urea is a product of the degradation of amino acids.
3. In this process, amino acids lose their amine group which is then transformed into ammonia.
4. In the liver, ammonia reacts with carbon dioxide to form urea and water by a process known as ureogenesis.
5. So, Urea is the main nitrogenous waste in human beings as they are ureotelic animals.