Here's how it works:

* Cellular Respiration: Our cells use oxygen to break down food for energy, producing carbon dioxide as a waste product.

* Gas Exchange: The respiratory system, specifically the lungs, facilitates the exchange of gases between the body and the environment. Oxygen is taken in, and carbon dioxide is released.

* Exhalation: As we exhale, carbon dioxide and water vapor are expelled from the body.

Let me know if you have any other questions!