Body Fluids and Circulation Question 75
75. Pulmonary artery differs from pulmonary vein in having
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(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.