Respiratory function refers to the process by which the body takes in oxygen and expels carbon dioxide. This occurs primarily in the lungs, where oxygen from the air is exchanged for carbon dioxide in the blood. The main structures involved include the trachea, bronchi, and alveoli, which facilitate this gas exchange. The respiratory system also plays a role in regulating blood pH and maintaining homeostasis. It works closely with the circulatory system to ensure that oxygen is delivered to tissues and organs while removing waste gases. Proper respiratory function is essential for overall health and well-being.