Last update:

Lung Lobes and Fissures

  • The lungs are anatomically and functionally divided into large subunits called lobes.
  • The slightly larger right lung is divided into the image descriptionsuperior lobe, image descriptionmiddle lobe, and image descriptioninferior lobe lobe. Only two lobes are present in the smaller left lung, the superior and inferior.
The superior lobe of the lungs labeled
The middle lobe of the lungs labeled
The inferior lobe of the lungs labeled
1
2
3
4
  • Each lobe receives air from its own image descriptionsecondary bronchus and is separated from its neighbors by fissures (or connective tissue walls).
Secondary bronchus of the lung
1
2
  • These anatomical partitions help prevent mechanical damage or infectious agents from affecting nearby the lobes.
  • In the right lung, a image descriptionhorizontal fissure separates the superior and middle lobes and an image descriptionoblique fissure separates the middle and inferior lobes. A second image descriptionoblique fissure separates the two lobes of the left lung.
The horizontal fissure of the right lung
The oblique fissure of the right lung
1
2
3
4
Mediastinal view of the lungs labeled superior lobe, horizontal fissure, middle lobe, oblique fissure, inferior lobe
1
2

An Overview of the Lung Lobes and Fissures:

Costal: image descriptionShow/image descriptionHide answers

Mediastinal: image descriptionShow/image descriptionHide answers

Test yourself with answers hidden
Test yourself with answers shown
Test yourself with answers hidden
Test yourself with answers shown
Swipe to show/ hide answers and to switch between viewsM=
1
2
3
4