Bronchoscopic anatomy of the bronchial tree

 Question 1 from the second paper of 2005 asks the candidate to describe this anatomy: " Describe  the  anatomy   of the  tracheobronchial tree, as  seen  down  a  bronchoscope inserted via an endotracheal tube."

In short, these are the landmarks one encounters when performing a bronchoscopy.

• Right main bronchus
  • right upper lobe bronchus at 12 o'clock
    • branches to the apical, anterior and posterior segments
  • right bronchus intermedius
    • right middle lobe bronchus
      • 3 branches: to the right middle medial and lateral segments
    • right lower lobe bronchus
      • apical segment of the lower lobe
      • four basal segments: medial, lateral, anterior and posterior

• Left main bronchus
  • left upper lobe bronchus
    • superior division
      • apicoposterior and anterior segments
    • lingular division
      • superior and anterior segments
  • left lower lobe bronchus
    • apical segment of the lower lobe
    • three basal segments: lateral, anterior, and posterior.