The kidneys filter wastes and excrete fluid when the pressure of blood in the bloodstream forces blood through the internal structures of the kidney.
Last reviewed 6/27/2012 by Melissa B Bleicher, MD, Division of Renal, Electrolyte, and Hypertension, Hospital of the University of Pennsylvania, Philadelphia, PA. Review provided by VeriMed Healthcare Network, and David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.
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