Do arteries carry blood to the heart or away from the heart?
Away from the heart
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Why do arteries need thick walls?
They have to carry blood that is being pumped at a high speed to go to the rest of the body. Therefore, they have to have thick walls to withstand the high pressure.
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Why do veins have valves?
To prevent the back-flow of blood.
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Why do capillaries have thin walls?
So that there isn't far for the gases to diffuse across.
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Which type of blood vessel carries oxygen and food close to the cells?
Capillaries
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Which type of blood vessel returns blood to the heart?
Veins
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What is the name of the largest artery in the body?
The aorta.
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What is the name of the largest vein?
The vena cava.
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Other cards in this set
Card 2
Front
Why do arteries need thick walls?
Back
They have to carry blood that is being pumped at a high speed to go to the rest of the body. Therefore, they have to have thick walls to withstand the high pressure.
Card 3
Front
Why do veins have valves?
Back
Card 4
Front
Why do capillaries have thin walls?
Back
Card 5
Front
Which type of blood vessel carries oxygen and food close to the cells?
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