What is the primary function of the respiratory system?

The primary function of the respiratory system is to facilitate the exchange of gases between the body and the environment. This involves the intake of oxygen, which is essential for cellular respiration and energy production, and the expulsion of carbon dioxide, a waste product of metabolic processes. The human respiratory system includes structures such as the lungs, trachea, and diaphragm, all working together to ensure that oxygen is brought into the body and carbon dioxide is effectively removed.

This function is crucial for maintaining homeostasis and supporting various physiological processes. Oxygen is transported to cells throughout the body, where it is used to produce energy, while the removal of carbon dioxide helps to regulate blood pH and maintain the body's overall acid-base balance.