PATHOLOGY

Detailed explanation-1: -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-2: -Blood pressure is highest within the large arteries (such as the aorta) because they are connected directly to the ventricle of the heart. As the blood vessel splits from the small arteries and into the arterioles, there is a drop in blood pressure.

Detailed explanation-3: -Arteries have thick walls as they carry oxygenated blood with high pressure from the heart to all body parts. Veins on the other hand have thin walls and carry deoxygenated blood from the body towards the heart.

Detailed explanation-4: -Thick walls of arteries help them to resist the pressure of the flow of blood in them. Elastic walls of arteries: The elastic layer allows stretching and absorbs pressure. The walls stretch and recoil in response to pumping, thus peaks in pressure are absorbed.