Bronchopulmonary Segments

The Bronchopulmonary Segments are the functional units of the lungs involved in he gaseous exchange.

The lungs have the following Bronchopulmonary Segments on the right side:

1 Right main bronchus

2. Right upper lobe bronchus

3. Right middle lobe bronchus

4. Right lower lobe bronchus

5. Apical segment bronchus

6. Posterior segment bronchus

7. Anterior segment bronchus

8, Lateral segment bronchus

9. Medial segment bronchus

10. Apical segment bronchus

11. Medial basal bronchus

12. Anterior basal bronchus

13. Lateral basal bronchus

14. Posterior basal bronchus

On the left side the Bronchopulmonary Segments are:

1. Left main bronchus

2. Left upper lobe bronchus

3. Left lower lobe bronchus

4. Apical upper lobe bronchus

5. Posterior upper lobe bronchus

6. Anterior upper lobe bronchus

7. Superior bronchus

I Lingula

8. Infenor bronchus i

9. Apical bronchus

10. Anterior basal bronchtis

11. Lateral basal bronchus

12. Posterior basal bronchus

Right lower lobe bronchus divides into apical, medial basal, anterior basal, lateral basal and posterior basal segment bronchi.

Left upper lobe bronchus divides into apical, anterior and posterior segment bronchi. Left upper lobe bronchus also gives rise to lingular bronchus which is further subdivided into superior and inferior segment bronchi:

Left lower lobe bronchus divides into apical, anterior basal, posterior basal and lateral basal segment bronchi.

So the segmental bronchi along with lung parenchyma constitute the bronchopulmonary segments which are 10 in number on right side.

Upper lobe: Apical, posterior and anterior. Middle lobe: Lateral and medial.

Lower lobe: Apical (superior), medial basal (cardiac), anterior basal, lateral basal and posterior basal.

On the left side bronchopulmonary segments are 9 in number viz,

Upper lobe: Apical, posterior and anterior.

Lingular lobe: Superior lingular and inferior lingular.

Lower lobe: Apical, inferior basal, lateral basal and posterior basal.