Missed our latest free live-stream? Catch up now on our Procedure Tips (Chris Nicholas) and Right Lower Quadrant Pain (Matt Morgan)

Left lung

The left lung is one of two lungs, located in the left hemithorax on the left of the heart and mediastinum

There are a few differences between the two lungs:

  1. The left lung is smaller in volume than the right lung, with a smaller transverse dimension (due to the heart on the left) but a larger longitudinal dimension (due to the liver causing the right hemidiaphragm to be higher than the left).
  2. The left main bronchus also differs to the right main bronchus, as it is shorter, smaller caliber and more horizontal.
  3. The left lung has just one fissure: the oblique fissure.
  4. The left lung contains 2 lobes and 8 bronchopulmonary segments:

For a detailed description of lung anatomy and function, see the lung article here.

Anatomy: Thoracic


Article information

rID: 38935
System: Chest
Section: Anatomy
Synonyms or Alternate Spellings:

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Figure 1: left sided bronchi
    Drag here to reorder.
  • Figure 2: bronchopulmonary segments: annotated CT
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.