Identify one nitrogenous waste that urine contains. Name the basic filtration unit of the kidney called?

The nitrogen compounds from which excess nitrogen is eliminated in living organisms are called nitrogenous wastes. Nitrogenous wastes removed by the kidneys are urea and ammonia. The one nitrogen waste present in urine is "Urea". The nephron is the basic filtration unit of the kidney. The urinary bladder regulates the amount of urine produced.