as I was told from early education that the air we currently breathe in contains 21% oxygen and 77-ish% of nitrogen and the rest are other particles.
So I have a dumb question on what the body uses nitrogen we breathe in for?
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Kinda off topic but came to mind. We produce nitric oxide in our sinus cavities and on our tongue, a highly reactive substance that has a very short half life when it enters our lungs it dilates our blood vessels making us take in more oxygen
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