Body Fluids and Circulation · Question 74

In which point, pulmonary artery is different from pulmonary vein?

1. Its lumen is broad
2. Its wall is thick
3. It has valves
4. It does not possess endothelium

Answer

(2) Its wall is thick

Solution

The pulmonary artery, like other arteries, carries blood under high pressure from the right ventricle.

⇒ Its wall is thick and muscular with a relatively narrow lumen, whereas the pulmonary vein has a thin wall and a broader lumen.

Both vessels are lined by endothelium, and the artery has no valves in its wall.

Answer: (2)