Question

External elastic membrane of blood vessel is well developed in ________.

• A. Tunica media of artery
• B. Tunica interna of artery
• C. Tunica externa of vein
• D. Tunica media of vein

Answer 1

The correct option is A Tunica media of artery

Arteries have three layers, each made of different connective tissues. Arteries have elastin fibre which provides elasticity.

a. Outer layer (tunica adventitia) : This layer is mostly made of collagen fibers, giving the artery strength without making it rigid.

b. Middle layer (tunica media) : The tunica media is made of smooth muscle cells and elastin fibers, giving the artery flexibility.

c. Innermost layer (tunica intima) : This layer is the innermost layer, consists of an inner surface of smooth endothelium covered by a surface of elastic tissues.

So, the correct answer is option A.