A) larger lumen
B) thick muscular walls
C) no endothelium
D) valves
Correct Answer: B
Solution :
| [B] Arteries have thick walls, narrow lumen but no valves. Endothelium is present in both arteries and veins. Impure blood comes from different body organs, is first recieved by right auricle and from there it flows to right ventricle. Later flows impure blood through pulmonary artery and then to arteries to the lungs. |
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