Tube | Bronchial

: These branch off the main bronchi to supply the specific lobes of the lungs (three on the right, two on the left).

: The trachea divides into the right main bronchus (shorter and wider) and the left main bronchus (longer and narrower). bronchial tube

The tubes are composed of sturdy but flexible and smooth muscle . As the tubes get smaller, the amount of cartilage decreases while smooth muscle increases, allowing the airways to change diameter to regulate airflow. Key Functions Bronchiectasis usually the result of damage to airways : These branch off the main bronchi to