Osmosis video - Nitrogen and urea cycle

The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms. One important aspect of the nitrogen cycle is the urea cycle, which involves biochemical reactions that produce urea from ammonia. The urea cycle takes place primarily in the liver, and to a lesser extent in the kidney. Its main role is to convert excess nitrogen in the body into urea, which is then excreted in the urine.