how kidneys remove waste from blood
Summary. 1  Kidneys are a special filter system for your body. 2  Kidneys remove waste products from the blood and produce urine. 3  Kidneys control the levels of many substances in the blood.  Early detection of kidney disease can be life saving.
Most people know that a major function of the kidneys is to remove waste products and excess fluid from the body. These waste products and excess fluid are removed through the urine. The production of urine involves highly complex steps of excretion and re-absorption.