Final answer:
Arteries have the greatest diameter among the mentioned vessels. Veins, venules, and arterioles have varying diameters.
Step-by-step explanation:
Arteries have a greater diameter compared to the other vessels mentioned. Arteries carry oxygenated blood away from the heart to various parts of the body. They have strong and elastic walls to withstand the pressure exerted by the blood flow.
Veins carry deoxygenated blood towards the heart. They have thinner walls and larger lumens than arteries, but their diameter is generally smaller than arteries. Venules and arterioles are smaller vessels that connect arteries and veins.
Learn more about Comparison of vessel diameters