| a bronchus or any of its ramifications or branches. |

The system of tubelike structures that connects the trachea to the lungs. (See respiratory system.)
bronchial tube n.
Any of the smaller divisions of the bronchi of the lung.
| bronchial tube (brŏng'kē-əl) Pronunciation Key
A bronchus or any of the tubes branching from a bronchus. The bronchial tubes decrease in size as they descend into the lungs. |