Ornithine cycle occurs in

The ornithine cycle, also known as the urea cycle, takes place primarily in the liver. It is a metabolic pathway that plays a critical role in the removal of toxic ammonia (NH₃) from the body by converting it into urea. The urea is then transported to the kidneys for excretion in the urine. The liver is central to this process, as it houses the enzymes required for the various steps of the ornithine cycle. This cycle is vital for maintaining nitrogen balance in the body and preventing the buildup of ammonia, which can be harmful to tissues and organs.