MEDICAL PHYSIOLOGY

Detailed explanation-1: -The correct answer is Arteries. The blood flows in a fixed route through arteries and veins maintains a continuous flow throughout the body inside the closed tube or blood vessels. These vessels are of mainly 2 types. The walls of arteries are thick and non-collapsible, the pressure inside them is very high.

Detailed explanation-2: -Walls of the arteries are thick because they have to withstand the high pressure released from the heart during the process of pumping the blood. Therefore, the thick walls of the arteries help in maintaining the blood pressure simultaneously by controlling blood flow.

Detailed explanation-3: -Since the blood pumped from the heart into the arteries flows at higher pressure than the blood in veins, hence arteries need to have thicker walls or else the high blood pressure might cause them to burst.