NEETZoologyBody Fluids and Circulation
What are the three layers that each artery and vein consists of?
Options
- ASquamous endothelium, smooth muscle, fibrous connective tissue
- BSquamous endothelium, elastic fibres, collagen fibres
- CTunica intima, tunica media, tunica externa
- DElastic fibres, squamous endothelium, fibrous connective tissue
Correct answer
C. Tunica intima, tunica media, tunica externa
Step-by-step solution
The blood flows strictly by a fixed route through Blood Vessels—the arteries and veins. Basically, each artery and vein consists of three layers: an inner lining of squamous endothelium, the tunica intima , a middle layer of smooth muscle and elastic fibres, 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