The aerospace industry is responsible for the design, manufacture, and repair of aircraft and spacecraft. The industry exists outside the earth's atmosphere and includes everything from commercial airliners to cargo planes, passenger jets, space stations, and satellites. Aviation is a different sector from the aerospace industry, which is a much larger factory. The term "aviation" refers to a variety of activities related to mechanical flight and the aircraft industry. The word "aviation" comes from the Latin word avis, which means bird.

Before learning to fly, every student pilot must obtain a medical certificate, as required by civil aviation regulations. Obtaining a medical certificate entails obtaining medical confirmation that the body is fit to travel. However, this does not rule out the possibility of medical issues during the flight.

To be more accurate, regardless of how healthy one's body is, everyone may experience medical conditions during actual flight. For example, hypoxia, hyperventilation, flying illusion, airsick, fatigue. Also, with the acquisition of relevant information, it is difficult to detect hypoxia in any tissue type immediately. Tissue hypoxia is normally followed by the following symptoms during flight:

1. The color of nails or lips turns purple.
2. Headache
3. Increased reaction time
4. Judgment has decreased significantly.
5. Inexplicable ecstasy
6, the vision is inexplicably blurred.
7. Difficulty
8. Top-heavy or dizzy
9. Needle tingling in fingers and toes
10. Loss of consciousness

If you find or realize any of the above situations, you should first consider the occurrence of tissue hypoxia. The treatment of tissue hypoxia is also quite simple: reduce the flying altitude, provide artificial oxygen or both.

Hyperventilation
Another disorder that may occur during flight is hyperventilation, which is caused by inadequate carbon dioxide levels in the blood due to rapid breathing. It is more common in new students learning to fly, and it is typically triggered by tension-induced shortness of breath. The solution is also amazingly simple. Cover your mouth with a bag and take a slow, deep breath.

In addition, many symptoms of hyperventilation are like tissue hypoxia. The most obvious difference is shortness of breath during hyperventilation. This is also the fastest way to distinguish between the two symptoms.

Flying illusion
Physical and visual illusions are the most common types of flight illusions. The human body's composition determines the illusion of the body, which cannot be removed! It can only be prevented to the maximum extent possible by acquired information! Flight illusions come in a range of shapes and sizes. When maneuvering in instrument weather, many of them appear. The following are the most common scenarios:

1. The plane changes to level flight very slowly when turning;
2. The pilot looks back or bows his head when the plane is turning;
3. The aircraft has been in a stable turn for a long time;
4. Sudden acceleration or deceleration of the aircraft;
5. The plane suddenly leveled off from climbing.