542 



RESPIRATORY SYSTEM OF THE OX 



largest, and has the forni of a three-sided pyramid with its base resting on the diaphragm. The 

 cardiac lobe is prismatic and forms the posterior margin of the cardiac notch; its long axis corre- 

 sponds to the fifth rib. The apical lobe of the left Imig is small and pointed; its ventral margin 



Dorsal border 



Apical lobe 



Carrliac lobe 



Diaphragmatic 

 lobe 



Fig. 4S1. — Left Lung of Ox; Later.a.l View. 

 Arrows indicate interlobar fissures. 



Dorsal border 



Diaphragmalic lobe 

 ayid surface 



N Apical lobe 



^ ■ Cardiac impression, 



Cardiac lobe 



Fig. 482. — Left Lung of Ox; Medial View. 

 7, Stem bronchus; i', bronchial branch for apical and cardiac lobes; ^.pulmonary artery; 5, 5, 5, pulmonary veins; 

 4, groove for aorta; 5, groove for cesophagus. Arrows indicate interlobar fissures. 



lies on the pulmonary artery and the anterior aorta; below this the space in front of the heart 

 is occupied by the apical lobe of the right lung. In some oases additional fissures partially sub- 

 divide the apical lobe, and on the other hand the apical lobe of the right lung may be undivided. 



