More cards in this set

Card 6

Front

The walls of the heart are made almost entirely of muscle. What supplies this muscle with oxygen?

Back

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Card 7

Front

Where does blood enter your heart?

Back

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Card 8

Front

What blood comes into the right atrium?

Back

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Card 9

Front

What blood comes into the left atrium?

Back

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Card 10

Front

What happens when the atria contract together?

Back

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Card 11

Front

What is the purpose of valves?

Back

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Card 12

Front

What do the ventricles do?

Back

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