Hilum of lung
Above and behind the cardiac impression
Cardiac impression
Cardiac impression can refer to:* Cardiac impression on liver* Cardiac impression on lung...

 is a triangular depression named the hilum, where the structures which form the root of the lung
Root of the lung
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 heart and the trachea....

 enter and leave the viscus. These include the pulmonary artery
Pulmonary artery
The pulmonary arteries carry deoxygenated blood from the heart to the lungs. They are the only arteries that carry deoxygenated blood....

, superiormost on the left lung
Left lung
The human left lung is divided into two lobes, an upper and a lower, by the oblique fissure, which extends from the costal to the mediastinal surface of the lung both above and below the hilum....

, the superior and inferior pulmonary veins, lymphatic vessels and the bronchus
A bronchus is a passage of airway in the respiratory tract that conducts air into the lungs. The bronchus branches into smaller tubes, which in turn become bronchioles....

, with bronchial vessels surrounding it. The pulmonary ligament
Pulmonary ligament
The root of the lung is covered in front, above, and behind by pleura; at its inferior border, the investing layers come into contact. Here they form a sort of mesenteric fold, the pulmonary ligament, which extends between the inferior part of the mediastinal surface of the lung and the pericardium...

 droops down from the hilum of the lung and terminates in a free, or falciform, edge.

The area around the hilum is called "perihilar".

External links

- "Transverse section through lung" - "Isolated lung, medial or hilar surface"
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