Why does Oxygen displacement (via inert gas) knock people out in seconds but people can hold their breath much longer?
In: Biology
When you breathe out air, it still has most of its oxygen in it. That’s how mouth-to-mouth resuscitation works. Holding your breath is just ignoring the build up of CO2, there is still lots of O2 there. You can breathe for quite a while in an enclosed space with a CO2 scrubber. Removing the oxygen, that’s a problem.
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