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Q.

Pulmonary artery differs from pulmonary vein in having

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a

Thick wall

b

Thin wall

c

Valves

d

Both B and C

answer is D.

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Detailed Solution

  • Blood in the pulmonary artery is under pressure as it is pumped to a short distance (lungs) and so it has thick wall to withstand the heart pressure.
  • The pulmonary vein transports oxygenated blood from the lungs into the left side of the heart from the pulmonary circulation.
  • In general, arteries don't have valves.
  • Thus, to handle the pressure and prevent the backflow of blood, pulmonary veins have thick walls and valves.
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