part of part of kidney kidney blood vessel venous blood vessel renal venous blood vessel UBERON:0014401 EMAPA:31450 we follow MA and MP in distinguishing the venous blood vessel from the vein. The kidney cortex vein is not considered a renal vein, nor is the vasa recta kidney venous blood vessel MA:0002591 venous blood vessel of kidney kidney venous system Any member of the network of tubes that return blood from the renal tissues to the systemic circulation.