EVERYDAY SCIENCE

Detailed explanation-1: -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.

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: -The walls of the arteries are thick and elastic. This is because, as mentioned before, the pressure of the blood that is pumped out from the heart is high, and it is important for the artery to have a strong wall so that it does not burst.

Detailed explanation-4: -Arteries have thick, elastic walls.

Detailed explanation-5: -Arteries are always under high pressure. To accommodate this stress, they have an abundance of elastic tissue and less smooth muscle. The presence of elastin in the large blood vessels enables these vessels to increase in size and alter their diameter.