D. flows into the alveoli and then moves through the capillaries.
Explanation:
Once air enters the lungs, it flows into the alveoli and then moves through the capillaries.
The lungs, being rich in alveoli, are essential for the occurrence of hematosis, a process of gas exchange. Hematosis occurs when oxygen from respiration passes into the blood present in the blood capillaries surrounding the alveoli, and carbon dioxide present in the blood then diffuses into the alveoli. This gas exchange ensures that all cells receive the oxygen needed to perform cellular respiration, and eliminate what was produced in cellular activities and is no longer needed.
