Bronchi

At the carina trachea, the bifurcation takes place so that the trachea divides into two principal bronchi, or sometimes called main bronchi (primary) bronchi. They are labelled right and left , the right being slightly more inclined towards the vertical plane than the left so that its angle with the parent trachea is smaller than that of the left. Foreign bodies may therefore find it easier to enter the right than the left.

The main bronchi now divide into lobar bronchi for the lobes of the two lungs. On the right there are three lobes and hence three lobar bronchi bearing the names of their lobes- Inferior lobar bronchus supplying the inferior lobe, superior lobar bronchus supplying the superior lobe, and finally the middle lobar bronchus supplies the middle lobe which is only found in the right lung

 
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Principal bronchus

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Lobar bronchus

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Segmental bronchus

 
Respiratory tree

Bronchial apparatus: 1 lobar bronchus 2 segmental bronchus 3 lobular bronchiole 4 terminal bronchiole 5 respiratory bronchiole 6 alveolar duct 7 alveolar sac 8 alveolus

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Electronic School of Medicine
Creator: Oluwole Ogunranti

 
Nose to bronchi-respiratory anatomy- 3D model

 

 

 

 

 

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