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?
In: 387
Nitrogen is inert but it still serves an important function. It does defuse across the alveolar membrane some but mostly it helps keep alveoli open so that O2 can be defused into your bloodstream and CO2 can be defused out of the blood stream. Also if there were less nitrogen in the atmosphere then we would be breathing a higher percentage of 02 and that would be toxic when it reached 0.5 bar. Normal o2 at sea level is approximately 0.21.
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