What is the function of the Capillary Network in the respiratory system?

The capillary network in the respiratory system primarily facilitates the exchange of gases between the alveoli and the bloodstream. Oxygen from the inhaled air diffuses through the thin walls of the alveoli into the surrounding capillaries, where it binds to hemoglobin in red blood cells. Conversely, carbon dioxide, a waste product of metabolism, diffuses from the blood into the alveoli to be exhaled. This efficient exchange is essential for maintaining proper oxygen and carbon dioxide levels in the body.