Right main bronchus

Dr Henry Knipe and Dr Masaki Bannai et al.

The trachea bifurcates into the right and left main bronchi at the level of the carina, supplying air to the right and left lungs respectively. Each main or primary bronchus enters the hilum of its lung and gives rise to secondary lobar bronchi, which further divide into tertiary segmental bronchi supplying the bronchopulmonary segment.

The right main bronchus is wider, shorter and courses more vertically when compared to the left main bronchus 1,2. It is approximately 2.5 cm long and reaches the root of the right lung at the level of T5, lying inferolateral and posterior to the right pulmonary artery 1.

It gives rise to three lobar bronchi, initially bifurcating into right upper lobe bronchus and bronchus intermedius 1. Bronchus intermedius further divides into right middle lobe and lower lobe bronchi 1.

Relations

At right pulmonary hilum:

Right main bronchus is supplied by one single right bronchial artery 2. It arises from one of the following origins:

Thoracic anatomy
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Article information

rID: 45645
System: Chest
Section: Anatomy
Tag: cases
Synonyms or Alternate Spellings:
  • RMB

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Cases and figures

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    Figure 1: right sided bronchi
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