THE LUNGS 



455 



are grooves for the trachea, the anterior aorta, the anterior vena cava, and 

 other vessels. 



Ligament of lung {cut) 



Bronchial artery 

 I Bronchus 

 Pulmonary I / Pulmonary Venous 



veins I : artery impression 



Line of rcjhclion 

 of pleura 



Fig. 362. — Left Lung of Horsk, Mkdi.\stix.\i. .wd Diaphragmatic Surfaces. 

 Organ hardened in situ. (\'enou.s impres.sion for coinmou dorso-cervieo-vertebral stem.) 



Pulmonary 



Groove for artery Bronchus 



anterior c.d. \ \ Groove for vena azygos 



vena cava ,' ; i '. *, ] 



• Dor-'s'ar kot-<^^ 

 Cr-ooue ^or aor/a 



Ligament of lung {cut) 



P^ Groove foroesopf^og 



; '?\ .^T Area oF 



^ ^--- . ^ adhesion 



^^mct.c 5u 



hiX^P 



Line of reflection of pleura 



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



Organ hardened in situ, c, d. Grooves for superior cervical and dorsal veins. Arrows indicate canal for posterior 



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 (Margo acutus) is thin and short. It presents, 



