Body Fluids and Circulation Question 75

75. Pulmonary artery differs from pulmonary vein in having

[2000]

(a) no endothelium

(b) valves

(c) large lumen

(d) thick muscular walls

Show Answer

Answer : d

Hints & Solutions

(d) Arteries have thick wall and narrow lumen while veins have thin walls and large lumen. Arteries do not have valves.