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a Anatomy of the kidney and b the nephron. In the glomerulus, the blood is filtered. In the proximal convoluted tubule, most of the filtrate—both water and ions—is reabsorbed. The loop of Henle (consisting of the proximal straight tubule, the descending thin limb, and ascending thin and thick limb) concentrates the preurine and in the distal convoluted tubule more NaCl is reabsorbed [16]
