Nephrons and the collecting duct system yramid Papila Arcuate Interlobular Cortex Medullary Interlobar Renal arten Short-loop medulla nephron ong-loop Medula Cortex Ureter Renal corpuscle Proximal convoluted tubule convoluted tubule Proximal straight tubule Renal pe cting duct Cut edge of pel 6. Distal straight tubule medullary (thick ascending limb) ElDovior items and derived items e 2007 by Mosby, ina, an afliate of Elsevier Inc