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The kidneys are paired organs that lie posterior to the abdomen, in the area of the lower back. The kidneys make urine, which is transported from the kidneys to the bladder by the ureters.
Review Date 4/1/2025
Updated by: Kelly L. Stratton, MD, FACS, Associate Professor, Department of Urology, University of Oklahoma Health Sciences Center, Oklahoma City, OK. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.