Why is it important to maintain oxygen levels when flying at high altitude?

Maintaining oxygen levels when flying at high altitude is crucial primarily because it prevents hypoxia, a condition that occurs when the body doesn't receive enough oxygen. At high altitudes, the atmospheric pressure decreases which results in lower oxygen availability in the air. This can lead to serious health risks, including impaired cognitive and motor functions, fatigue, and in severe cases, loss of consciousness.

Ensuring adequate oxygen levels helps to maintain proper physiological functioning, allowing pilots and passengers to remain alert and responsive during flight. By providing supplemental oxygen or ensuring the cabin is pressurized to appropriate levels, airlines can mitigate the risks associated with hypoxia, ensuring safety and comfort for those aboard.