Main bronchus - AbsoluteAstronomy.com

Main bronchus can refer to the following lung structures:

Right main bronchus
Right main bronchus
The right main bronchus is a bronchus of the respiratory system. It is wider, shorter, and more vertical in direction than the left...
Left main bronchus
Left main bronchus
The left main bronchus is smaller in caliber but longer than the right, being nearly 5 cm long...

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