Flight physiology studies how the body responds to the unique conditions of flying. When an aircraft ascends, the air pressure decreases, which can lead to reduced oxygen levels. This can affect a pilot's performance and alertness, making it essential to understand how to manage these changes. Additionally, the body experiences various forces during flight, such as G-forces during maneuvers. These forces can impact blood circulation and overall physical comfort. Understanding flight physiology helps in designing better safety measures and training programs for pilots and passengers, ensuring a safer flying experience.