CTET paper 2, Feb 2016 Q63

63Which of the following statements are true about veins in human circulatory system?
A. All veins carry carbon dioxide-rich blood.
B. Veins have thin walls.
C. Veins carry blood from different organs to heart.

Option : A
Explanation : Mainly all veins have thin walls and they carry deoxygenated (CO2) blood from organs to heart except for pulmonary vein which carries oxygenated blood from lungs to heart.

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