Question

Which of the following is true about veins?
A) Veins carry blood away from the heart, while arteries carry blood to the heart.
B) Veins are more muscular than arteries.
C) Veins have valves; arteries do not.
D) Veins have a smaller diameter lumen than arteries.

Answer 1

Veins have valves; arteries do not. This is because veins carry deoxygenated blood and this blood should not flow back.Valves ensure forward movement of blood.

Answer 2

Which of the following is true about veins?

A) Veins carry blood away from the heart, while arteries carry blood to the heart.

B) Veins are more muscular than arteries.

C) Veins have valves; arteries do not.

D) Veins have a smaller diameter lumen than arteries.

The correct answer is :

C) Veins have valves; arteries do not.

Explanation :

The statement is true about veins, that veins have valves, whereas arteries do not have valves.

Veins carry deoxygenated blood in the body towards the heart. Veins are located very close to skin. Viens do not have a muscular layer like arteries, so these are dependent on valves to keep the blood moving. Valves are found in the veins which are used to keep the blood moving. Veins start out as small blood vessels called venules and become full-sized veins as they get closer to the heart.

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