Importance:
Lung capacity is closely related to people's breathing. Physiological research shows that all organs, systems, tissues and cells of the human body consume oxygen all the time, and only when the oxygen supply is sufficient can the body work normally. The oxygen supply in the human body depends entirely on the breathing of the lungs. In the process of breathing, the lungs not only inhale oxygen, but also expel carbon dioxide metabolized in the body.
We can think that the lung is a transit station for gas exchange in the body, and the volume of this transit station directly determines the amount of gas exchange each time, which is the most intuitive and objective index for detecting lung function.
Refer to the above content: Baidu Encyclopedia-vital capacity