The clinical pictures which had several to the reduction of the pressure of oxygen in high altitude in the human being to 5.550 m .a.s.l (18.204 ft) the partial oxygen pressure diminishes to half, equal number of diminution of the oxygenation, 20% of the people who ascend over the 2.500 m .a.s.l (8.200 ft) in less of a day present/display some degree of altitude sickness, is very important for the adaptation to the height, in which time and whichever meters it is promoted since if we would not count on the factor of adaptation would not exist cities or tows over 2.500 m .a.s.l (8.200 ft) or would not be possible to be ascended to that altitude or grater level.
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