A) Thick walled in which blood flow at high pressure
B) Thin walled blood flow with low pressure
C) Thick walled and blood flow low pressure
D) None of the above
Correct Answer: A
Solution :
Arteries convey the blood (oxygenated) away from the heart. In arteries blood flows at high pressure. The wall of arteries is made up of 3 layers. The innermost layer is endothelium that remains in direct contact of blood. It is surrounded by a thick layer of elastic fibres and smooth muscles. The elastic tissue allows the artery to expand and recoil in response to the high pressure of blood. The elastic layer is covered by an envelop of connective tissue.
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