A) Tunica media and tunica externa form a single out
B) tunicaintema and tunica media form a single coat
C) tunicaintema, tunica media and tunica extemaare thin
D) Tunica media is a thin coat
Correct Answer: D
Solution :
[d] Basically each artery and vein consists of three layers, an inner lining of squamous endothelium, the tunica internal, a middle layer of smooth muscle and elastic fibre, the tunica media and an external layer of fibrous connective tissue with collagen fibres, the tunica external. The tunica media is comparatively thin in the veins making a large lumen in veins.
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