Body Fluids and CirculationMedium
Question
A vein possesses a large lumen becaues
Options
A.tunica media and tunica externa form a single coat
B.tunica interma and tunica media form a single coat
C.tunica interma, tunica media and tunica externa are thin
D.tunica media is a thin coat
Solution
Basically each artery and vein consists of three layers, an inner lining of squamous endothelium, the tunica interna, 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 externa.
The tunica media is comparatively thin in the veins making a large lumen in veins.
The tunica media is comparatively thin in the veins making a large lumen in veins.
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