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Principal bronchi

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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The trachea divides into two principal bronchi, one on each side to the respective lung, at the inferior border of the manubrium sternii - the tracheal bifurcation:

  • left principal bronchus
  • right principal bronchus

They form the conduit for air transfer between trachea and lung hila. Macro- and microscopically, the main bronchi closely resemble the trachea.

The main bronchi ramify into lobar bronchi.

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