Afferent aretriole, glomerlus, efferent arteriole, peritubular capillaties, Vasa recta, proximal convoluted tubule, descenring limb and ascending limb of the loop of Henle, Distal convoluted tubule, and collecting ducts. Starting with the renal artery explain how the kidneys produce and concentrate urine. Include the following structures in your explanation.