- Right lung
Name = PAGENAME
Latin = pulmo dexter
GraySubject = 240
GrayPage = 1096
Caption = Mediastinal surface of right lung.
Caption2 = 1. Anterior border
2. Mediastinal part
Base of lung
The Right lung is divided into three lobes, (as opposed to two lobes on the left) superior, middle, and inferior, by two interlobular fissures:
* One of these, the
oblique fissure, separates the inferior from the middle and superior lobes, and corresponds closely with the fissure in the left lung. Its direction is, however, more vertical, and it cuts the lower border about 7.5 cm. behind its anterior extremity.
* The other fissure, the horizontal fissure, separates the superior from the middle lobe. It begins in the previous fissure near the
posterior border of the lung, and, running horizontally forward, cuts the anterior border on a level with the sternalend of the fourth costal cartilage; on the mediastinal surfaceit may be traced backward to the hilus.
The middle lobe, the smallest lobe of the right lung, is wedge-shaped, and includes the lower part of the anterior border and the anterior part of the
base of the lung. (There is no middle lobe on the left lung, though there is a lingula.)
The superior and inferior lobes are similar to their counterparts on the
Difference in size
The right lung, although shorter by 5 cm. than the left, in consequence of the diaphragm rising higher on the right side to accommodate the
liver, is broader, owing to the inclination of the heart to the left side. Consequently, the volume, the total capacity and the weight of the right lung is higher than in the left.
On the mediastinal surface, immediately above the hilus, is an arched furrow which accommodates the
azygos vein; while running upward, and then arching lateralward some little distance below the apex, is a wide groove for the superior vena cavaand right innominate vein; behind this, and nearer the apex, is a furrow for the innominate artery.
Behind the hilus and the attachment of the
pulmonary ligamentis a vertical groove for the esophagus; this groove becomes less distinct below, owing to the inclination of the lower part of the esophagus to the left of the middle line.
In front and to the right of the lower part of the esophageal groove is a deep concavity for the extrapericardiac portion of the thoracic part of the
inferior vena cava.
* [http://rad.usuhs.edu/medpix/medpix.html?mode=single&recnum=7747#top Lung Lobes]
* - "Mediastinal surface of the right lung."
* [http://training.seer.cancer.gov/ss_module03_lung/unit02_sec05_quiz_match02.html Diagram and quiz at cancer.gov]
* [http://www.univie.ac.at/anatomie2/pembody/body6b-text.html Cross section at univie.ac.at]
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