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Card 6

Front

What does the vena cava do?

Back

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Card 7

Front

If there is higher pressure behind a valve, is it forced open or shut?

Back

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Card 8

Front

If there is higher pressure in front of a valve, is it forced open or shut?

Back

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Card 9

Front

Why do arteries have elastic tissue in the walls?

Back

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Card 10

Front

Why is the endothelium in the artery folded?

Back

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Card 11

Front

Do arteries have thick or thin muscle layer?

Back

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Card 12

Front

Do veins have a thick or thin muscle wall?

Back

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Card 13

Front

Do veins contain valves?

Back

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Card 14

Front

Do arteries contain valves?

Back

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Card 15

Front

How is blood helped to flow through veins?

Back

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