Last update: Nov 17th, 2017

Lungs Anatomy | Shapes and Surfaces of the Lungs

• Due to the elevated position of the liver, the right lung is slightly (= 5 cm) shorter than the left lung. The left lung, however, has less volume because some space is taken up by the heart.

1

2

3

4

• Each lung is cone-shaped. The concave base rests on the diaphragm and the narrow apex projects under the clavicle.

1

2

3

• A double-walled, fluid-filled sac called the pleura envelops each lung and aids in the ventilation process.

1

2

• The anterior, lateral, and posterior lung surfaces lie adjacent to the ribs and are thus often referred to as the costal surface.

1

2

• Between the lungs is the mediastinum. This large open space contains the heart, blood vessels, esophagus, nerves, trachea, and primary bronchi.

1

2

• Along the mediastinal surface of each lung is a depression called the hilum (or hilus).

1

2

3

• This is the region where the major blood vessels, bronchi, and nerves enter and leave the lung. Together, these structures form the root of the lung.
• A prominent indentation called the cardiac notch is also present along the mediastinal surface of the left lung. This indentation provides room for the apex of the heart.

1

2

An Overview of the Shapes and Surfaces of the Lungs:

Show/Hide answers

Test yourself while observing the Shapes and Surfaces of the Lungs

1

2