Which part of the kidney is responsible for transporting blood that has been filtered back to the circulatory system? A Ureter B Cortex and medulla C renal vein D Renal artery

C renal vein

The correct answer is C) Renal vein.

The renal vein is responsible for transporting blood that has been filtered back to the circulatory system. After the blood is filtered in the kidneys and waste products are removed, the "clean" blood is returned to circulation through the renal vein.