Question

A vein differ from an artery in having
(a) strong muscular walls
(b) narrow lumen
(c) valves to control direction of blood flow
opposite to heart
(d) valves to control direction of blood flow
towards heart

Answer 1

The correct option is  "A vein differ from an artery in having valves to control direction of blood flow towards heart."

Explanation:

• Oxygenated blood is carried by arteries (blood vessels) away from heart to the body.
• While blood vessels that carry de-oxygenated blood back to the heart for re-oxygenation are known as veins.
• Arteries do not have valves since the pressure from the heart keeps the blood running through them in opposite direction from heart.
• Unlike arteries, veins need valves because they need to keep the blood running in the direction of the heart.

Answer 2

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• ✒(a)strong muscular walls