Question

Explain why is human life impossible at higher altitudes without supplementary supply of oxygen

Answer 1

Answer:

Human life is impossible at higher altitudes without supplementary oxygen gas because oxygen is a heavy gas and on upper reaches its quantity is low.

Answer 2

Answer:

After the human body reaches around 2,100 metres (6,900 ft) above sea level, the saturation of oxyhemoglobin begins to decrease rapidly.

However, the human body has both short-term and long-term adaptations to altitude that allow it to partially compensate for the lack of oxygen. There is a limit to the level of adaptation; mountaineers refer to the altitudes above 8,000 metres (26,000 ft) as the death zone, where it is generally believed that no human body can acclimatize.[