What Kidneys Do?

Kidney act like a 24-hour cleaning crew for your blood. They filter out waste products. They get rid of excess water. They balance chemicals in your blood such as potassium and sodium .They remove excess acid. They also produce a hormone to help the bone marrow make red blood cells.

Most people have two kidneys, each the size of a fist. these are located on either side of the backbone, just above the small of the back. Each day, the kidneys pump about 200 liters of blood through 140 miles of tubes and millions of filters.