High altitude has long been known to have effects on humans. High altitude is classified as being between 1500 meters to 3500 meters above sea level; very high altitude is classified as being between 3500 meters to 5500 meters, while extreme altitude is anything above 5500 meters (Wilkerson 1). At sea level oxygen in the air is at approximately 21% and barometric pressure is 760mmHg, when altitude increases to 5000 feet barometric pressure now becomes 483mmHg with 40% fewer oxygen molecules per breath (Curtis 2). …showed first 75 words of 1587 total…

…showed last 75 words of 1587 total…