Which of the following statements is incorrect regarding air exhalation?

The statement that exhaled air is dryer than atmospheric air is incorrect. In fact, exhaled air typically contains more water vapor than the air we breathe in, making it more humid. This is because, during the process of respiration, moisture from the lungs and the mucous membranes is added to the air as it is expelled.

The other statements about exhaled air are accurate. Exhaled air is indeed cooler than atmospheric air, particularly after the body’s internal warmth is transferred to the air. It also contains higher concentrations of carbon dioxide relative to oxygen, resulting from metabolic processes in the body. Additionally, exhaled air is generally warmer than the surrounding atmospheric air as it has been heated by the body before it is expelled.