Question

question
select all of the ways that arteries and veins differ structurally.
select all that apply
veins have larger lumens than arteries.
the tunica media is thicker in arteries compared to veins.
the walls of veins are composed of two tunics, whereas the walls of arteries are composed of three tunics.
arteries have high - pressure valves that veins lack

Explanation:

• Veins have larger lumens than arteries: Veins carry blood back to the heart at lower pressure, so their lumens (interior spaces) are larger. Arteries carry blood away from the heart at higher pressure and have relatively smaller lumens.
• The tunica media is thicker in arteries compared to veins: The tunica media (middle layer of blood - vessel walls) in arteries is thicker because arteries need to withstand and regulate high - pressure blood flow. Veins have less need for this thick muscular layer as blood pressure in veins is lower.
• The walls of veins are composed of two tunics, whereas the walls of arteries are composed of three tunics: This is incorrect. Both arteries and veins have three tunics (tunica intima, tunica media, tunica externa).
• Arteries have high - pressure valves that veins lack: This is incorrect. Veins have valves (low - pressure valves) to prevent backflow of blood, while arteries do not have these types of valves.

Answer:

Veins have larger lumens than arteries, The tunica media is thicker in arteries compared to veins.