Would breathing At deep-sea horizontal provide more or smaller number oxygen than breathing 2 liter O2 at 6000 foot elevation?
Answers: At 500 ml per breath and 12 breaths per minute, the average person at rest exchanges 6 L per minute.
At marine level this represents approximately 1.26 L/min O2.
This would seem to be to indicate that 2L/min O2 at any altitude would provide more oxygen than unassisted breathing at sea smooth.
We know this to be untrue at altitudes above 26,000 ft., where a pressurized envelope is prerequisite for the diffusion of O2 through lung membranes. At 6,000 ft., however, there is still adequate atmospheric pressure to make the relationship hold.
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