Ashley Davidoff MD TheCommonVein.netlungs-0739
Ashley Davidoff MD TheCommonVein.net lungs-0740nL

Ashley Davidoff TheCommonVein.net 32686b05

This diagram shows the segmental branches of the right bronchial system. The RUL has three branches, the apical, posterior and anterior segments. (teal overlay) The middle lobe has two segmental branches called lateral and medial segments. (pink) The right lower lobe has five: the superior, anterior basal, lateral basal, posterior basal and medial basal segments. Ashley Davidoff MD. TheCommonVein.net 32686b03

This is a drawing is of a left lung in coronal section. Note there are only two lobes separated by the major fissure
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Ashley Davidoff MDTheCommonVein.net 32686b05L05b

Ashley Davidoff
TheCommonVein.net

This coronal reformat shows the position of the main branch pulmonary arteries relative to the position of their respective bronchi. While the RPA runs under the right mainstem bronchus, the LPA runs above the left mainstem.
Courtesy Ashley Davidoff MD TheCommonVein.net 32620b01

To remember the difference in the sizes of the mainstem bronchi think of 2 very different men in the airways. The right – short, stout and cute, and the left – tall thin and gracile
The carinal angle is about 85 degrees
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Ashley Davidoff MD TheCommonVein.net lungs-0703