Which statement best defines hypoxia?

The statement that best defines hypoxia is a state of oxygen deficiency in the body. Hypoxia occurs when the body or a region of the body is deprived of adequate oxygen supply, which is crucial for cellular metabolism and normal physiological functions. This condition can result from various factors, including high altitudes where oxygen levels are lower, or specific medical conditions that impair oxygen absorption or transport.

Understanding hypoxia is essential, especially in aviation and medical contexts, as it can lead to serious health implications, including impaired cognitive function, loss of consciousness, and even fatality if not promptly addressed. The clarity of this definition emphasizes the importance of oxygen for survival and the body's overall function, making it a fundamental concept in both life sciences and aviation safety strategies.