lower respiratory tract; lower airway
Medical term referring to the trachea, bronchi, bronchioles, and lungs. Contrasts with 上気道 (upper respiratory tract).
Lower respiratory tract infections can cause pneumonia.
The doctor performed a bronchoscopy to examine the condition of the lower airway.
Compound of 下 (lower) + 気道 (airway, respiratory tract). A straightforward medical term.