Learning to Breathe by Andy Cave
Author:Andy Cave
Language: eng
Format: epub
Publisher: Random House
Published: 2010-04-09T16:00:00+00:00
AIR
‘As one ascends through the atmosphere, barometric pressure decreases (though the air still contains 21% oxygen) and every breath contains fewer and fewer molecules of oxygen. One must work harder to obtain oxygen, primarily by breathing faster. This is particularly noticeable with exertion, such as walking uphill . . . As the amount of oxygen in the lungs decreases, the blood becomes less and less efficient at acquiring and transporting oxygen. This means that no matter how fast one breathes, attaining normal blood levels of oxygen is not possible at high altitude.’
Thomas E. Dietz, Emergency & Wilderness Medicine
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