Kidneys are as important to your health as your heart or your lungs. Kidneys remove waste products from your body, regulate water and produce hormones. Normally, people have two kidneys, one on either side of the spine under the lower ribs. They are reddish brown in colour and shaped like kidney beans. Each kidney is about the size of your clenched fist.
One of the main jobs of the kidneys is to remove wastes from the blood and return the cleaned blood back to the body. Every minute, about one litre of blood (one fifth of all the blood pumped by the heart) enters the kidneys through the renal arteries. After the blood is cleaned, it flows back into the body through the renal veins.
Location of the Kidneys