The human body makes ammonia when it breaks down protein into amino acids. The liver then converts ammonia into urea before it leaves the body through urine or sweat. Older research in a 2021 ...

The ureters are tubes that carry urine from the kidneys to the bladder, whereas the urethra is the tube that carries urine out of the body. Urine contains water, urea and salts. Urea is produced ...

If body cells lose or gain too much water by osmosis they do not function efficiently. We cannot control the level of water, ion or urea loss by the lungs or skin. For example, in a hot climate ...