The kidneys<span> remove waste products from metabolism such as urea, uric acid, and creatinine ... homeostasis by regulating the concentration and volume of body </span>fluids<span>. ... </span>After<span> passing through the afferent arteriole, the filtered </span>blood enters<span> the vasa recta. ... The </span>name<span> is based on the fact that concentration </span>