Body Fluids And Circulation Ques 85

85. A vein possesses a large lumen because

[1990]

(a) tunica media and tunica externa form a single coat.

(b) tunica interna and tunica media form a single coat.

(c) tunica interna, tunica media and tunica externa are thin.

(d) tunica media is a thin coat.

Show Answer

Answer : d

Hints & Solutions

(d) Veins have larger lumen because the wall of blood vessels is made up of tunica externa, tunica media & tunica interna is thin in veins.

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