The role of the respiratory system in homeostasis is essential, primarily involving gas exchange. The respiratory system enables the uptake of oxygen and the expulsion of carbon dioxide, maintaining optimal levels of these gases within the bloodstream. This balance is crucial for cellular respiration and, consequently, energy production in cells. Additionally, the respiratory system helps regulate body pH by controlling the concentration of carbonic acid formed from dissolved carbon dioxide. Overall, it plays a critical part in sustaining physiological stability.