The thickest and strongest blood vessel is the

• vein

• artery

• capillary

• both veins and capillaries

The blood vessel that has the largest diameter is

• vein

• artery

• capillary

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 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

Carry blood toward heart; mostly oxygen-poor

• Arteries
• Veins
• Capillaries

These are one cell thick

• arteries

• capillaries

• veins

Gas, nutrient, and waste exchange occur between the __________ and the tissues of the body.

• arteries

• capillaries

• veins

What is blood vessel 2?

• Arteries

• Veins

• Capillaries