Given the question: Q: After passing through capillaries and being filtered, clean blood leaves what organ through a vein? Read this paragraph and choose the correct option from the provided answers: Blood with wastes enters each kidney through an artery, which branches into many capillaries. After passing through capillaries and being filtered, the clean blood leaves the kidney through a vein. Choices: - pancreas - liver - heart - kidney A:
The answer is:
kidney