what we breat in pure oxygen
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We breathe air that is 21 percent oxygen, and we require oxygen to live. So you might think that breathing 100 percent oxygen would be good for us -- but actually it can be harmful. So, the short answer is, pure oxygen is generally bad, and sometimes toxic. ... When you inhale, the alveoli fill with this air.
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Pure oxygen can be deadly.
Our blood has evolved to capture the oxygen we breathe in and bind it safely to the transport molecule called haemoglobin.
If you breathe air with a much higher than normal O2 concentration, the oxygen in the lungs overwhelms the blood's ability to carry it away.
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