Urea formation occurs in the liver. The liver is responsible for many functions in the body, one of which is removing harmful toxins such as ammonia from the bloodstream. Ammonia is produced when the body breaks down protein from the foods we eat.
To prevent ammonia from building up in the body, the liver converts it into a less harmful substance called urea. Urea can then be safely transported through the bloodstream to the kidneys and eventually eliminated from the body through urine.
So, the liver plays a crucial role in the process of urea formation, which helps to maintain a healthy balance of nitrogenous waste products in the body.