ANATOMY

GENERAL ANATOMY

CARDIOVASCULAR SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following are the blood vessels that have the thickest walls; why do they have thick walls?
A
Arteries; carry the most blood
B
Arteries; carry blood under higher pressure
C
Veins; carry blood under low pressure
D
Veins; carry blood under higher pressure
Explanation: 

Detailed explanation-1: -Arteries have thick walls and are situated superficially in comparison to other blood vessels. Arteries are blood vessels, the network of pathways through which the oxygenated blood travels away from the heart to various cells, tissues, and organs of the human body.

Detailed explanation-2: -Arteries are the largest blood vessels with the thickest walls, and capillaries are the smallest.

Detailed explanation-3: -Arteries have thick walls because they need to withstand high pressure generated by the heart. Veins have thin walls because they do not need to withstand as much pressure. Arteries are also narrower than veins, which allows for faster blood flow.

Detailed explanation-4: -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.

Detailed explanation-5: -Blood pressure in the arteries is much higher than in the veins, in part due to receiving blood from the heart after contraction, but also due to their contractile capacity. The tunica media of arteries is thickened compared to veins, with smoother muscle fibers and elastic tissue.

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