Most people are born with two kidneys, each the size of a fist. They’re located in your back, on either side of the spine, and just below the rib cage.
Kidneys filter blood and remove waste. They are also master regulators, working to ensure the body maintains a balanced state.
Kidneys are vital to your health, although you need just one functioning kidney to live a normal, healthy life. Because you need just one, it’s possible for a living person to donate a kidney to someone in need of one. Speak to your doctor if you are interested in finding out more about kidney transplants.