When the diameter of the fine particles in the haze is 10 microns, it can directly enter the alveoli and bronchioles of the human body, stimulating the bronchoconstriction, affecting the ventilation function of the alveoli and causing hypoxia induced by the body.

1. When the diameter of the fine particles in the sputum is 10 microns, it can directly enter the alveoli and bronchioles of the human body, stimulating the bronchoconstriction, affecting the ventilation function of the alveoli and causing hypoxia induced by the body.