The primary system responsible for removing nitrogen-containing wastes from the body is the urinary system, specifically through the kidneys.
When the body metabolizes proteins, it breaks them down into amino acids, which are then used for various functions. During this process, nitrogen is released in the form of ammonia. Ammonia is toxic in high amounts, so the liver converts it into urea, a less harmful compound. This urea is then transported through the bloodstream to the kidneys.
The kidneys filter the blood, removing urea along with other waste products and excess substances such as water, salts, and other metabolites. This filtered fluid eventually becomes urine, which is stored in the bladder until it is expelled from the body.
This process not only helps get rid of nitrogenous waste but also plays a crucial role in maintaining the body’s overall fluid and electrolyte balance.