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In which point is pulmonary artery different from pulmonary vein :
A
Its lumen is broad
B
Its wall is thick
C
It has valves
D
It does not possess endothelium
Detailed Solution
Arteries carry blood away from the heart under high pressure, so they have thick, muscular and elastic walls and a narrow lumen.
Veins carry blood towards the heart under low pressure, so they have thin walls, a wide lumen and valves.
The pulmonary artery (carrying deoxygenated blood to the lungs) is an artery, so its wall is thicker than that of the pulmonary vein.
Both have an endothelium lining.
So the pulmonary artery differs in that its wall is thick.
Veins carry blood towards the heart under low pressure, so they have thin walls, a wide lumen and valves.
The pulmonary artery (carrying deoxygenated blood to the lungs) is an artery, so its wall is thicker than that of the pulmonary vein.
Both have an endothelium lining.
So the pulmonary artery differs in that its wall is thick.