6. One-way blood flow through the heart

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9 Terms

1
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The heart is a pump with _ connected circuits. The right side sends _ to the lungs, and the left side sends _ to the systemic circulation.

two, deoxygenated blood, oxygenated blood

2
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  1. The _ return systemic blood to the _.


vena cava, right atrium

3
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  1. Blood passes through the _ into the _.


right AV valve, right ventricle

4
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3. Right-ventricular contraction sends blood through the _ into the _ and to the lungs.

pulmonary valve, pulmonary artery

5
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4. Oxygenated blood returns from the lungs to the _ through the _.

left atrium, pulmonary veins

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5. Blood passes through the _ into the _.

left AV valve, left ventricle

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6. Left-ventricular contraction sends blood through the _ into the _ and the _.

aortic valve, aorta, systemic circulation, systemic circulation

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Valves prevent _.

back flow

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Valves open and close because _.

Pressure differences