During the breathing cycle, when air is taken in and out, the lungs always retain a residual volume of air. This ensures sufficient time for the absorption of oxygen and release of carbon dioxide, facilitating effective gas exchange for cellular respiration.
Explain the significance of the breathing cycle in the lungs and the residual volume of air.
Share
The breathing cycle in the lungs involves inhalation and exhalation, ensuring a continuous exchange of gases. During inhalation, air is drawn into the lungs, filling the alveoli with oxygen, and during exhalation, carbon dioxide is expelled. The lungs always retain a residual volume of air, even after exhalation. This residual volume serves a crucial role in maintaining a constant presence of oxygen for absorption and allowing sufficient time for carbon dioxide release. It ensures a continuous supply of oxygen to the bloodstream and facilitates the removal of waste gases, contributing to the efficiency of gas exchange during the breathing cycle.