For the Australian television series Airways, see Airways (TV series). The pulmonary airway is comprised of those parts of the respiratory system through which air flows, conceptually beginning (on inhalation from the external environment) at the nose and mouth, and terminating in the alveoli. It is generally used synonymously with respiratory tract, to avoid sounding overly scientific. From the mouth or nose, inhaled air passes through the pharynx into the trachea, where it separates into the l… (More on Airway)