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
So everyone has said nothing, and that’s true, but: our bodies are *used* to it being there. It’s like saying you don’t need a pillow and blanket to sleep, but it’s comfortable and we’re used to it so we want it. Our bodies want air with nitrogen in it because it’s easier to breathe. Oxygen is actually a pretty harsh gas and so it’s much easier on our bodies to just get a little at a time.
If life on Earth evolved with a much higher Oxygen content, we would have developed a *much* different set of lungs.
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