The statement "We exhale oxygen-rich air from our lungs" is false. When we breathe in, we inhale oxygen-rich air. This oxygen is then absorbed into our bloodstream through the lungs and transported to our body's cells to produce energy through a process called cellular respiration. During this process, oxygen is used by the cells to break down glucose and produce ATP (adenosine triphosphate), which is the energy currency of cells.
Conversely, when we exhale, we release carbon dioxide, which is a waste product of cellular respiration. The air we exhale is carbon dioxide-rich rather than oxygen-rich. This carbon dioxide is transported back to the lungs through the bloodstream, where it is removed from the body when we exhale.
Therefore, the correct statement should be: "We exhale carbon dioxide-rich air from our lungs."
