Left lung 5141452 219415067 2008-06-15T03:04:22Z CyclePat 460922 Replaced image with one that doesn't require references {{main|Lung}} {{Infobox Anatomy | Name = {{PAGENAME}} | Latin = pulmo sinister | GraySubject = 240 | GrayPage = 1096 | Image = Gray973.png | Caption = Mediastinal surface of left lung. | Image2 = illu_quiz_lung04.jpg | Caption2 = 1. [[Oblique fissure]]<BR>2. Vertebral part<BR>3. [[Hilum of lung]]<BR>4. [[Cardiac impression on lung|Cardiac impression]]<BR>5. [[Diaphragmatic surface of lung|Diaphragmatic surface]] | System = | Precursor = | MeshName = | MeshNumber = | DorlandsPre = | DorlandsSuf = | }} The '''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 of lung|hilus]]. As seen on the surface, this fissure begins on the [[mediastinal surface of the lung]] at the upper and posterior part of the hilus, and runs backward and upward to the [[posterior border of the lung|posterior border]], which it crosses at a point about 6 cm. below the [[apex of the lung|apex]]. It then extends downward and forward over the costal surface, and reaches the lower border a little behind its anterior extremity, and its further course can be followed upward and backward across the mediastinal surface as far as the lower part of the hilus. ==Lobes== The ''superior lobe'' lies above and in front of this fissure, and includes the apex, the anterior border, and a considerable part of the costal surface and the greater part of the mediastinal surface of the lung. The ''inferior lobe'', the larger of the two, is situated below and behind the fissure, and comprises almost the whole of the base, a large portion of the costal surface, and the greater part of the posterior border. ==Impressions== llll On the mediastinal surface, immediately above the hilus, is a well-marked curved furrow produced by the [[aortic arch]], and running upward from this toward the apex is a groove accommodating the [[left subclavian artery]]; a slight impression in front of the latter and close to the margin of the lung lodges the [[left innominate vein]]. Behind the hilus and pulmonary ligament is a vertical furrow produced by the [[descending aorta]], and in front of this, near the base of the lung, the lower part of the [[esophagus]] causes a shallow impression. ==Additional images== <gallery> Image:Respiratory system complete numbered.svg|Diagram of the respiratory system Image:Lungs anatomy.png|Anatomy of lungs Image:Gray490.png|Front view of heart and lungs Image:Gray503.png|Transverse section of thorax, showing relations of pulmonary artery Image:Gray1032.png|The position and relation of the esophagus in the cervical region and in the posterior mediastinum, seen from behind Image:Gray1178.png|The thymus of a full-time fetus, exposed in situ </gallery> written by Ellie x ==See also== * [[Lingula of left lung]] * [[Right lung]] ==External links== * {{Chorus|00459}} * {{SUNYAnatomyFigs|19|06|01}} - "Mediastinal surface of the left lung." * [http://training.seer.cancer.gov/ss_module03_lung/unit02_sec05_quiz_match04.html Diagram and quiz at cancer.gov] * [http://learning.mgccc.cc.ms.us/science/cat/sld030.htm Slide at mgccc.cc.ms.us] * {{RocheLexicon|02101.002-1}} * {{GPnotebook|879427643}} - "lobes (left lung)" * [http://cai.md.chula.ac.th/lesson/lesson4312/chest_physical/lung_segment.jpg Diagram at md.chula.ac.th] {{respiratory-stub}} {{Gray's}} {{Lung}} <br /> [[Category:Organs]] [[Category:Respiratory system]] [[Category:Thorax]] [[Category:Cardiovascular system]]