Biology, asked by sampujya77, 7 months ago

All veins except Pulmonary vein requires valve, why? Explain in detail

Answers

Answered by satyamkumar9450

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. ... There are valves in most veins to prevent backflow.

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