Today I have found out that The lungs bring in the oxygen inside the heart when you breath,the heart pumps blood to the lungs to pick up oxygen.
Then pumps the Oxygenated blood out to the rest of the body. After the blood has delivered all the oxygen, it picks up carbon dioxide a waste product. Then the blood goes back to the lungs to drop off the carbon dioxide and pick up more oxygen then its starts all over again.
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