- Root of the lung
Name = PAGENAME
Latin = radix pulmonis
GraySubject = 240
GrayPage = 1097
Caption = Mediastinal surface of right lung.
Caption2 = Mediastinal surface of left lung.
DorlandsPre = r_02
DorlandsSuf = 12688029
A little above the middle of the mediastinal surface of each
lung, and nearer its posterior than its anterior border, is its root, by which the lung is connected to the heartand the trachea.
The root is formed by the bronchus, the
pulmonary artery, the pulmonary veins, the bronchial arteriesand veins, the pulmonary plexuses of nerves, lymphatic vessels, bronchial lymph glands, and areolar tissue, all of which are enclosed by a reflection of the pleura.
The root of the
right lunglies behind the superior vena cava and part of the right atrium, and below the azygos vein. That of the left lungpasses beneath the aortic arch and in front of the descending aorta; the phreni pericardiacophrenic artery and vein, and the anterior pulmonary plexus, lie in front of each, and the vagusand posterior pulmonary plexus behind each; below each is the pulmonary ligament.
The chief structures composing the root of each lung are arranged in a similar manner from before backward on both sides, viz., the upper of the two pulmonary veins in front; the pulmonary artery in the middle; and the bronchus, together with the bronchial vessels, behind.
From above downward, on the two sides, their arrangement differs, thus:
On the right side their position is—eparterial bronchus, pulmonary artery, hyparterial bronchus, pulmonary veins, but on the left side their position is—pulmonary artery, bronchus, pulmonary veins.
The lower of the two pulmonary veins, is situated below the bronchus, at the apex or lowest part of the hilus.
* - "Transverse section through lung"
* [http://training.seer.cancer.gov/ss_module03_lung/unit02_sec01_anatomy_lung.html Diagram at seer.cancer.gov (#21)]
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