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Where is oxygen added to the blood?

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4 votes

Answer: The bloodstream

Step-by-step explanation:

User Bentayloruk
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Answer:

Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body.

User Panu Horsmalahti
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