Nephron and Associated Structures Proximal convoluted tubule Bowman’s capsule Distal convoluted tubule Cortical radiate artery (red) Cortical radiate vein (blue) (blue) Afferent arteriole Arcuate artery Efferent arteriole Arcuate vein Descending limb of the loop of Henle Collecting duct Ascending limb of the loop of Henle Papillary duct