Breathing is a vital process that enables gas exchange, which is essential for cellular respiration and overall bodily function. When we inhale, oxygen-rich air enters the lungs, where it diffuses into the bloodstream through tiny air sacs called alveoli. Simultaneously, carbon dioxide, a waste product of metabolism, diffuses from the blood into the alveoli to be expelled during exhalation. This exchange of gases—oxygen in and carbon dioxide out—is crucial for maintaining the body's pH balance and ensuring that organs and tissues receive the oxygen they need to function properly.
- All Course Editors: Admin User