THE LUNGS 



455 



are grooves for the trach(>a, the anterior aorta, the anterior vena cava, and 

 other vessels. 



Bronchial artery 

 I Bronchus 

 Pulmown-!/ I ; rulmonary y^^^^^^ 



impression 



Ligament of lung (cul] 



artery 



^''S^foot/e for oesophagus ■ ' 



/Arect oF 

 <^dheswn 



Line of rejkction 

 of yleura 



Fig. 362. — Left Lung of Horse, Mediastinal and Diaphragmatic Surfaces. 

 Organ hardened in situ. (Venous impression for common dorso-cervico-vertebral stem.) 



Pulmonary 



artery Bronchus 



\ Groove for vena azygos 



Ligament of lung (cut) 



Line of reflection of pleura 



Fig. 36.3. — Right Lung of Horse, Mediastinal and Diaphragmatic Surfaces. 



Organ hardenetl in situ, c, il. Grooves for superior cervical and dorsal veins, .\rrows indicate canal for po.sterior 



vena cava between mediastinal lobe and main part of lung. 



The dorsal (or superior) border (Margo obtusus) is long, thick, and rounded; 

 it lies in the groove alongside of the bodies of the thoracic vertebrae. 



The ventral (or inferior) border fMargo acutus) is thin and short. It presents, 



