Bronchopulmonary Segments of the Lungs | Lung Segments | Tertiary Bronchi
Secondary Pulmonary Lobules of the Lungs
Walls of connective tissue (or septa) partitioned the bronchopulmonary segments into many polygonal-shaped secondary pulmonary lobules (or pulmonary lobules).
- The secondary pulmonary lobules measure approximately 1-3 centimeters in diameter and are most anatomically well-defined along the surface of the lungs.
- A secondary pulmonary lobule typically contains (see the image below) 3-5 terminal bronchioles (the smallest conducting tubules) and many respiratory bronchioles, alveolar ducts, and alveoli (where gases are exchanged with surrounding blood vessels).
An Overview of the Secondary Pulmonary Lobules of the Lungs:
Test yourself while observing the Secondary Pulmonary Lobules of the Lungs