ANATOMY AND PATHOLOGY 
Ext. jugular v 
Common carotid a 
Vagus nerve 
Cervical lobes 
of thymus 
Superficial cervical v 
Axillary v and a.- 
Rt. int. thoracic a. and v 
Cranial portion of 
right cranial lobe 
Caudal portion of 
right cranial lobe 
Cardiac notch x 
Trachea 
Internal jugular v. 
Superficial cervical v. 
Phrenic nerve and 
Pericardiacophrenic a. 
Left cranial lobe 
Cranial (ant.) inter- 
ventricular sulcus 
Middle lobe 
Right caudal 
(diaphragmatic) 
lobe 
Sternopericardial 
ligament 
, A\ Left caudal 
(diaphragmatic) 
■ /lobe 
vena cava 
anip,^Phr$nic vv. 
Figure 10.— Sternocostal surface of the sheep heart and lobes of the lungs. 
