Circulatory System-11

Blood vessel, heart, blood

Heart, lungs, blood

Blood vessel, artery, vein

Heart, artery, plasma

Artery, to withstand high pressure

Vein, to prevent backflow

Capillary, to allow exchange

Arteriole, to regulate flow

Artery

Capillary

Vein

Aorta

Arteries have thicker, more elastic walls and no valves, while veins have thinner walls and contain valves.

Arteries have thinner walls and contain valves, while veins have thicker, more elastic walls and no valves.

Both arteries and veins have the same wall thickness and no valves.

Veins carry blood away from the heart, while arteries carry blood to the heart.

They carry blood away from the heart.

They have relatively narrow lumen.

Their walls contain smooth muscle and elastic fibers.

They contain valves to prevent backflow.

Valves

Elastic fibers

Smooth muscle

Endothelium

Valves

Smooth muscle

Endothelium

Basement membrane

Arteries carry blood away from the heart under high pressure.

Veins have thick walls and narrow lumens.

Capillaries are one cell thick and connect arteries and veins.

Veins can contain valves to prevent backflow of blood.

Artery

Vein

Capillary

Venule