Multiple choice

Why is the blood pressure low in veins?

Select the correct answer: (a) Arteries are narrow and veins are wide. (b) Impure blood is less. (c) Veins have too many valves. (d) Heart pumps blood with less pressure in veins.

  1. Only (a) and (b)

  2. Only (a) and (c)

  3. Only (b) and (d)

  4. Only (b) and (c)

  5. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct answer. The blood pressure is low in veins because the blood flows through narrow arterioles and capillaries to enter wider veins. There are many valves inside the veins. These valves permit the flow of blood in the veins towards the heart and prevent blood flow in the reverse direction.

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