WESLEY D. ANDERSON 
789 
Costocervical vertebral v. 
Rt. ozygos vein 
Apical bronchus 
Trachea 
Longus colli m 
Origin of Lt. azygos 
vein from lumbar vv. 
Costocervica! vertebral v. 
Cranial (superior ) 
vena cava 
Brachiocephalic trunk 
Ascending aorta 
Descending 
thoracic aorra 
Lt azygos vein enter- 
ing coronary sinus 
Dorsal intercostal veins 
Cut surface of 
parietal pleura 
Diaphragm 
Figure 25. — Azygos system of veins. 
