Arteries veins capillaries

Human blood vessels are

• artries, capillaries, and atria

• ventricles, atria and pulmonary veins

• capillaries, artries, and veins

• veins, artries, and aorta

The thickest and strongest blood vessel is the

• vein

• artery

• capillary

• both veins and capillaries

Valves in veins

• support them

• protect them

• prevent the backward movement inside them

• provide them elesticity

Carry blood away from heart; mostly oxygen-rich

• Arteries
• Veins
• Capillaries

Small vessels that carry blood from arterioles and to small vessels called venules which then empty into veins

• Arterioles

• Arteries

• Veins

• Venules

• Capillaries

______________ are the smallest blood vessels.

• Arteries
• Veins
• Capillaries

______________ are the second largest blood vessel. 

• Arteries
• Veins
• Capillaries

Oxygen and carbon dioxide are transported between the blood and alveoli by way of

• exocytosis and endocytosis by endothelial cells

• diffusion from areas of higher concentration to lower concentration

• pinocytosis using fluid-filled vesicles

• active transport (using ATP) by protein carriers of endothelial cells

I have a large lumen, I have thin muscular walls.

• Artery

• Vein

• Capillary

• Arteriole

What is the space between the structure of a blood vessel?

• Artery
• Lumen
• Gap
• Loomen