Q:

Which of the following definitions best describes veins?

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Which of the following definitions best describes veins?


  1. a vessel that carries de-oxygenated blood.
  2. a vessel that carries blood towards the heart.
  3. vessels that contain valves.
  4. vessels through which blood flows under the influence of pressure produced by the heart.

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B: Veins carry blood towards the heart. In the case of the pulmonary veins only, the blood is oxygenated.

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