A unique adaptation to life at high altitudes has been discovered among the inhabitants of Tibet and Nepal
Scientists have discovered that residents of high-altitude regions in Tibet and Nepal possess unique physiological characteristics that enable their bodies to function effectively in low-oxygen environments.
The researchers analyzed data from 417 women who had lived their entire lives in Nepal at altitudes above 3,500 meters above sea level. They studied the relationship between physiological indicators and reproductive success, which is considered one of the criteria for evolutionary fitness.
The results showed that women with high levels of oxygen saturation in their hemoglobin gave birth to the largest number of children. At the same time, their hemoglobin levels remained average, which helped prevent excessive blood thickening and additional strain on the heart.
These women also exhibited better blood circulation in the lungs and larger left ventricles of the heart, which are responsible for pumping oxygen-rich blood throughout the body. The combination of these characteristics ensures more efficient oxygen utilization in the thin mountain air.
Scientists note that alongside physiological changes, social factors also play a role, particularly early childbearing and long-lasting marriages. However, it is these biological adaptations that have become one of the key factors for successful life in high-altitude regions.
Researchers believe that studying such populations helps to better understand the mechanisms of human evolution and adaptation to extreme environmental conditions.
Source: Știrile PRO TV.
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