What happens to the respiratory when you work?

During physical work or exercise, the respiratory system responds by increasing the rate and depth of breathing to supply more oxygen to the muscles and remove carbon dioxide more efficiently. This process is regulated by the brain's respiratory centers, which detect changes in blood acidity and carbon dioxide levels. As a result, the lungs expand more fully, and heart rate may also increase to facilitate oxygen transport. Overall, the respiratory system adapts to meet the heightened demands of physical activity.