Bronchus

These supply each lobe of the lung (three on the right, two on the left).

Hyaline cartilage provides structural support to keep the airways open during the pressure changes of breathing. bronchus

Acts as a passageway for air moving from the trachea to the smaller bronchioles and eventually the alveoli for gas exchange. These supply each lobe of the lung (three

Further divisions that supply specific bronchopulmonary segments. Histological Layers: bronchus