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Card 26

Front

What does a single circulatory system require?

Back

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Card 27

Front

What did Galen believe in the 2nd century?

Back

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Card 28

Front

What did William Harvey know in the 17th century?

Back

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Card 29

Front

What is a cardiac cycle?

Back

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Card 30

Front

How does the heart pump blood?

Back

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Card 31

Front

Why does heart race increase when you exercise?

Back

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Card 32

Front

What hormone causes the heart rate to increase?

Back

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Card 33

Front

How does the contraction of the heart remain constant?

Back

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Card 34

Front

What two procedures can be used to investigate irregular heart actions?

Back

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Card 35

Front

What are the names of the two natural pacemakers?

Back

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