Answer :

Hagrid
It is the Renal Artery that channels the is waste-filled blood the excretory system. Main function of renal artery is to carry blood from the heart to the kidney. It starts from the heart and carries a volume of blood to the kidney to be filtered.
raptortrainor2013

The main organs of the excretory system are the kidneys. Waste-filled blood is routed to the kidneys via the renal artery. The kidneys then filter the blood, removing excess water, salts, uric acid, and chemicals from medications or poisonous substances.

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