пятница, 2 ноября 2007 г.

Scientists have found out, why Tibet inhabitants do not suffer air illness.

The average height of Tibet territories exceeds 4 thousand meters above sealevel, and in Himalayas framing Tibet plateau from the south, the highestpoint of globe is located - mountain Chomolungma (Everest), with height of8850 meters above sea level. However, despite of unusual heights, Tibetans,apparently, do not suffer from dizziness at all, and low level of oxygen inthe blood, observable in people's organisms at such height, also does notaffect their state of health. Scientists have solved this strangeness ofnatives' organism: Tibetans' organisms compensate lack of blood oxygenincreasing quantity of the blood flowing to visceras.
Thus, blood remains badly sated by oxygen, however owing to intensity of ablood-groove, this lack is graded - such hypothesis has been put forward bya group of scientists under direction of physical anthropologist Sinty Billfrom the Ohio Case-western Reserve University.
For acknowledgement of their theory they have collected group of 88Tibetans-volunteers which live in territory of the Tibetan independent areawhere the height reaches 4 200 meters above sea level. Prtial pressure ofoxygen here is approximately in one and a half - two time lower than at anocean edge. The second group of volunteers was made by 50 people livingclose to the Cleveland university which territories only in 200 meters towerabove sea level. Further scientists have measured speed and volume ofparticipants' of research blood-groove, using for this purpose the specialdevice fixed around of forearms.
As a result, scientists have found out: through vessels on Tibetans' handstwice more blood is running, than through hands of Cleveland inhabitants.
Thus the average heart rate and blood pressure of Tibetans completelycoincided with similar parameters at Americans.

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