Question

what is Veins ? two line
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Answer 1

Answer:

Veins are vessels of the circulatory system that support circulation by conveying blood to the heart.

Answer 2

Explanation:

Veins are blood vessels that carry blood towards the heart. ... Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart.