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air enters the blood from the lungs by a chemical called hemoglobin which makes your blood red. As air enters your lungs if fills up a number of tiny membrane sacks that are covered in tiny capillaries(blood vessels)the oxygen is pulled through the membrane and attracted to the hemoglobin where is it moved through the body to provide chemical energy for your body while at the same time swapping the oxygen with Co2 which then does the opposite and leaves the lungs.

please feel free to add anything that i have missed.

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13y ago
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13y ago

The diaphragm below the lungs contracts (pulling on the lungs downward), which causes air to be sucked into your lungs.

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Q: How does the air that humans breathe enter the lungs?
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