Final answer:
The exchange of carbon dioxide and oxygen in the body occurs about 21,600 times per day during respiration.
Step-by-step explanation:
In the body, oxygen is used by cells of the body's tissues and carbon dioxide is produced as a waste product. The exchange of carbon dioxide and oxygen occurs in the lungs during the process of respiration. With every inhalation, air fills the lungs, and oxygen enters the bloodstream and travels to organs and tissues.
Carbon dioxide, on the other hand, is produced as a waste product by cells and exits the cells, enters the bloodstream, travels back to the lungs, and is expired out of the body during exhalation. The exchange of carbon dioxide and oxygen happens with every breath we take, which is approximately 15 times per minute on average for humans. This means that the exchange of carbon dioxide and oxygen occurs about 21,600 times per day.