Final answer:
The structure and function of blood vessels are closely related. Arteries have thick, elastic walls to withstand the high pressure of blood flow, while veins have thin walls and one-way valves to efficiently return blood to the heart.
Step-by-step explanation:
Structure and Function of Blood Vessels
Blood vessels, such as arteries and veins, have distinct structures that are directly related to their functions in the circulatory system. Arteries have thick, elastic walls made up of three layers: the innermost tunica intima, the middle tunica media, and the outermost tunica externa.
This structure allows arteries to withstand the high pressure of blood being pumped from the heart. In contrast, veins have thinner walls with less smooth muscle and elastic tissue, but they have one-way valves that help prevent backflow of blood and allow for efficient return of blood to the heart.