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Deoxygenated blood from the body enter the heart through the superior and inferior vena cava
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Then it enter the right atrium.
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Next it passes the tricuspid valve and enter the right ventricle
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Later it goes through the pulmonic valve and into the pulomary arteries.
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Then the blood picks up oxygen in the lung by capillaries.
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It goes back to the heart through pulmonary veins.
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Next the blood enters the left atruim.
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Then the blood passes the bicuspid/mitral valve and goes into the left ventricle.
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The it goes through the aortic valve.
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Finally, the blood move to the aorta and spread through out the body, The process starts all over again when the blood goes to the heart again.
