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The cardiovascular and the respiratory system both work toward the same goal, getting oxygen to tissues and getting carbon dioxide out. The respiratory system is involved in giving oxygen to the blood and removing all the co2 . When the heart receives blood that is low in oxygen and high in carbon dioxide, it pumps it to the lungs. When the lungs get bigger and get air from the environment, oxygen is transferred into the blood with the low-oxygen , and some of the co2 comes back into the lungs. Now that this blood has good oxygen in it, it returns to the heart and the heart then pumps it throughout the body.

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13y ago

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