Answer:
c) Carbon dioxide
Explanation:
In addition to oxygen exchange, the respiratory system functions to eliminate carbon dioxide from the body. During the process of respiration, oxygen is taken in by the body and transported to cells where it is used for cellular metabolism. As cells use oxygen, they produce carbon dioxide as a waste product. This carbon dioxide is then transported back to the lungs through the bloodstream.
In the lungs, carbon dioxide is exchanged for oxygen during exhalation, and it is expelled from the body through the process of breathing. This continuous exchange of gases ensures that the body maintains proper levels of oxygen and carbon dioxide, allowing cells to function optimally and maintain internal balance (homeostasis).
Therefore, the respiratory system plays a crucial role not only in obtaining oxygen for cellular function but also in eliminating carbon dioxide, a waste product of cellular metabolism, from the body.
