No, everyone has two kidneys, but one kidney is enough for daily exercise. Why do you want to have two kidneys, so that you can exchange rest and distribute them evenly, and the kidneys will not feel very tired.

It's equivalent that you can carry 50 Jin at most, but in fact you only need to carry 25 Jin, and you feel very relaxed. There is still a little room, and more power can erupt in times of crisis than usual.

Therefore, when a person loses a kidney, it does not mean that the person has lost the ability to live. He is still like ordinary people. I can't see the difference, but because there is only one kidney, the only kidney will take on all the work every day, and it is easy to get tired. There are still many problems.