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The secret of the body system.

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The parasite goes to the lungs to be cleaned.

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Then the gas exchange happens, it expels the CO2 and the blood takes the oxygen back to the heart and it goes around the body.

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Then it goes through the arteries and veins, through all the body, and it passes through the capillaries and sucks the oxygen and then goes to the carbon dioxide.

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and then goes back to the heart and the princess rapids again