Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Kidney Failure ?
    ### Response:
    Healthy kidneys clean your blood by removing excess fluid, minerals, and wastes. They also make hormones that keep your bones strong and your blood healthy. But if the kidneys are damaged, they don't work properly. Harmful wastes can build up in your body. Your blood pressure may rise.
    