Question

What will happen if the respiratory tract is not moist?

Answer 1

For maximum effectiveness, the respiratory surface requires humidity. Oxygen from the air dissolves momentarily in the surface water, allowing more time for the oxygen to cross the membrane of the alveoli. If the surface dries out, the exchange of gas will take place at a very low pace as fast-moving gaseous oxygen molecules do not cross the alveoli membrane effectively. The decreased exchange of gas is most probably not sufficient for essential functions to promote blood oxygenation. If the respiratory tract is not wet, the dirt particles in the inhaled water in the nasal cavities will not be removed from the atmosphere and will reach the lungs and cause lung issues.The temperature of the inhaled air for the soft passage in the respiratory tract is carried close to that of the body. It's not feasible if it's dry.If the surface dries out, the exchange of gas will take place at a very low pace as quickly moving gaseous oxygen molecules do not cross the alveoli membrane effectively. The decreased exchange of gas is most probably not sufficient for essential functions to promote blood oxygenation.Therefore, for smooth exchange of gases, the respiratory tract should be wet.