What is the primary purpose of an oxygen system in aviation?

The primary purpose of an oxygen system in aviation is to regulate and distribute pure oxygen to the crew and passengers during periods when the atmospheric pressure is insufficient for adequate breathing. This is particularly important at high altitudes where the oxygen levels in the air are significantly lower than at sea level, making it difficult for the human body to receive enough oxygen for proper physiological function.

The oxygen system is designed to deliver supplemental oxygen efficiently and safely, ensuring that all occupants can maintain cognitive function and endurance under reduced atmospheric conditions. Providing pure oxygen helps prevent hypoxia, a condition that can lead to serious impairment or loss of consciousness. Thus, the system is a critical safety feature in aircraft, especially when flying at high altitudes or in situations where the cabin pressure may be compromised.