What are my kidneys and what do they do?

You have two kidneys. The kidneys are shaped like beans. Each kidney is about the size of a fist. They are located just below your ribcage, one on each side of your spine. Your kidneys filter your blood. Each kidney is made of 1 million little filters. During every minute of every day, these filters take out waste materials that can hurt you. They also take out extra fluid from your blood. The wastes and extra fluid make urine. The urine flows from your kidneys to your bladder through tubes called ureters.The bladder stores urine until you urinate. Then, urine leaves the body through a tube called the urethra.