Arteries and Veins Structure Quiz

Which layer is the thickest in arteries?

• Tunica intima

• Tunica media

• Tunica externa

• Endothelium

What is the main function of valves in veins?

• Increase blood pressure

• Prevent blood from flowing backward

• Regulate blood flow to tissues

• Absorb nutrients

Which structure is only found in veins and not in arteries?

• Elastic fibers

• Smooth muscle

• Valves

• Endothelium

What type of blood do most arteries carry?

• Oxygenated

• Deoxygenated

• Both

• Neither

Which blood vessel has a larger lumen?

• Arteries

• Veins

• Capillaries

• Arterioles

Arteries have thicker walls than veins to withstand higher pressure.

• True

• False

Veins carry blood away from the heart.

• True

• False

Valves are present in both arteries and veins to prevent backflow.

• True

• False

The tunica externa is the innermost layer of both arteries and veins.

• True

• False

Arteries have a smaller lumen compared to veins.

• True

• False