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In the death zone, the human body cannot acclimatize. An extended stay in the death zone without supplementary oxygen will result in deterioration of bodily functions, loss of consciousness, and, ultimately, death. [3] [4] [5] The summit of K2, the second highest mountain on Earth, is in the death zone.
In mountaineering, the death zone refers to altitudes above which the pressure of oxygen is insufficient to sustain human life for an extended time span. This point is generally agreed as 8,000 m (26,000 ft), where atmospheric pressure is less than 356 millibars (10.5 inHg; 5.16 psi). [ 1 ]
While the rest of the human population would suffer serious health consequences at high altitudes, the indigenous inhabitants of these regions thrive in the highest parts of the world. These humans have undergone extensive physiological and genetic changes, particularly in the regulatory systems of oxygen respiration and blood circulation when ...
In the region from sea level to around 3,000 m (10,000 ft), known as the physiological-efficient zone, oxygen levels are usually high enough for humans to function without supplemental oxygen and altitude decompression sickness is rare. The physiological-deficient zone extends from 3,600 m (12,000 ft) to about 15,000 m (50,000 ft).
Acute mountain sickness, high-altitude pulmonary edema, high-altitude cerebral edema, chronic mountain sickness [2] Causes: Low amounts of oxygen at high elevation [1] [2] Risk factors: Prior episode, high degree of activity, rapid increase in elevation [2] Diagnostic method: Based on symptoms [2] Differential diagnosis
Over 81 million people live permanently at high altitudes (>2,500 m or 8,200 ft) [52] in North, Central and South America, East Africa, and Asia, and have flourished for millennia in the exceptionally high mountains, without any apparent complications. [53] For average human populations, a brief stay at these places can risk mountain sickness. [54]
A 2022 Outside article on heat stroke cites the highest known body temperature that a human was able to survive: “The highest body temperature measured was only 17 degrees above normal. Willie ...
Over 340 people have died attempting to reach—or return from—the summit of Mount Everest which, at 8,848.86 m (29,031 ft 8 + 1 ⁄ 2 in), is Earth's highest mountain and a particularly desirable peak for mountaineers. This makes it the mountain with the most deaths, although it does not have the highest death rate.