The term "respiratory" refers to anything related to the process of breathing and the organs involved in this function. The primary organs in the respiratory system include the lungs, trachea, and bronchi. This system is responsible for taking in oxygen from the air and expelling carbon dioxide, a waste product of metabolism. The respiratory system plays a crucial role in maintaining the body's oxygen levels and supporting cellular functions. It works closely with the circulatory system to transport oxygen to cells and remove carbon dioxide. Proper respiratory function is essential for overall health and well-being.