Ammonia is converted into urea in the liver. The liver plays a crucial role in the process of detoxification and elimination of waste products in the body. One of the waste products that the liver processes is ammonia, which is produced as a result of protein metabolism. Excess ammonia in the body can be toxic, so it is important for the liver to convert it into a less toxic substance.

The liver converts ammonia into urea through a series of biochemical reactions called the urea cycle. The urea cycle takes place within the liver cells, where ammonia is combined with carbon dioxide to form urea. Urea is then transported to the kidneys through the bloodstream, where it is excreted from the body in the form of urine.

In summary, the liver is responsible for converting ammonia into urea through the urea cycle. This process helps to eliminate toxic ammonia from the body and maintain overall health and homeostasis.