Right lung
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| Right lung | |
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| Mediastinal surface of right lung. | |
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| 1. Anterior border 2. Mediastinal part 3. Medial surface 4. Inferior lobe 5. Base of lung | |
| Latin | pulmo dexter |
| Gray's | subject #240 1096 |
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Overview
The Right lung is divided into three lobes, superior, middle, and inferior, by two interlobular fissures:
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 sternal end of the fourth costal cartilage; on the mediastinal surface it may be traced backward to the hilus.
Lobes
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 left lung.
Difference in size
The right lung, although shorter by 2.5 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; its total capacity is greater and it weighs more than the left lung.
Impressions
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 cava and 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 ligament is 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.
Additional images
 Anatomy of lungs. |
 Front view of heart and lungs. |
 Transverse section of thorax, showing relations of pulmonary artery. |
 The position and relation of the esophagus in the cervical region and in the posterior mediastinum. Seen from behind. |
 The thymus of a full-time fetus, exposed in situ. |
See also
External links
- Lung Lobes
- 00458 at CHORUS
- SUNY Figs 19:05-01 - "Mediastinal surface of the right lung."
- Diagram and quiz at cancer.gov
- Roche Lexicon - illustrated navigator, at Elsevier 02101.002-1
- Cross section at univie.ac.at
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
Anatomy of torso, respiratory system: Lungs and related structures | |
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| lungs | right • left • lingula • apex • base • root • cardiac notch • cardiac impression • hilum • borders (anterior, posterior, inferior) • surfaces (costal, mediastinal, diaphragmatic) • fissures (oblique, horizontal) |
| conducting zone | trachea (tracheal rings, carina) • bronchi • main bronchus (right, left) • lobar/secondary bronchi (eparterial bronchus) • segmental/tertiary bronchi (bronchopulmonary segment) • bronchiole • terminal bronchiole |
| respiratory zone | |
| pleurae | parietal pleura (cervical, costal, mediastinal, diaphragmatic) • visceral pleura • pulmonary ligament • recesses (costomediastinal, costodiaphragmatic) • pleural cavity |
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
