The human body achieves blood oxygen balance by inhaling oxygen and exhaling carbon dioxide to provide the body with the oxygen it needs, and this gas exchange is done in the alveoli, where the oxygen content of the gas just inhaled is very high. Oxygenation can be carried out through the alveolar membrane, respiratory membrane, and blood in the capillaries to increase the oxygen content in the blood. This gas exchange is a diffusive exchange. This means that oxygen enters the blood vessels from the alveoli, which have a high content of oxygen, and carbon dioxide enters the alveoli by diffusion and is discharged from the body through the tracheobronchi, creating a gas exchange between the alveoli and the blood. After this gas exchange is affected, the human body will have symptoms of oxygen deficiency, and will have chest tightness, shortness of breath, and even difficulty in breathing.