The bronchial tubes begin where the trachea splits (bifurcates) into two primary paths:
: Further divisions that supply smaller segments of the lungs. bronchial tube
: The smallest branches that eventually lead to alveoli , the microscopic air sacs where gas exchange occurs. The bronchial tubes begin where the trachea splits
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 two on the left).
: These branch off the main bronchi to supply the specific lobes of the lungs (three on the right, two on the left).