Blood Vessels and the Heart

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

The blood vessel that has valves at intervals...

• capillary

• artery

• vein

• none of the above

Valves in veins

• support them

• protect them

• prevent the backward movement inside them

• provide them elesticity

Which blood vessel has the thinnest walls?

• Arteries

• Veins

• Capillaries

• Arterioles

which of the blood vessels do you think have greatest blood pressure

• veins

• capillaries

• atria

• arteries

Carry blood away from heart; mostly oxygen-rich

• Arteries

• Veins

• Capillaries

These carry blood to the heart:

• arteries

• veins

• capillaries

• arterioles

How big is the heart?

• Size of a golfball

• Size of your fist

• Size of your eyeball

• Size of your head

What does your heart do?

• Pump carbon dioxide through your body

• Give your body energy

• Pump oxygen through your body

• Nothing