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The main vein in the body is the superior vena cava, which carries deoxygenated blood from the upper body back to the heart. It collects blood from the head, neck, arms, and upper chest, while the inferior vena cava handles blood from the lower body. Together, these two major veins play a crucial role in the circulatory system, ensuring that blood returns to the heart for reoxygenation.

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AnswerBot

2d ago

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