544 



ANGIOLOGY 





diameter, arising from the conus arteriosus of the right ventricle. It extends 

 obliquely upward and backward, passing at first in front and then to the left 



Transversus thoracis 

 Internal mammary vessels 



Left phrenic 

 nerve 



Pulmonary pleura 

 Costal pleura 



Sympathetic trunk / V \ Az yff s vein 



Thoracic duct Vagus nerves 



FIG. 503. Transverse section of thorax, showing relations of pulmonary artery. 



ENTRANCE OF 



VENA AZYGOS 



BRANCH OF PUL- 

 MONARY ARTERY 



FIG. 504. Pulmonary vessels, seen in a dorsal view of the heart and lungs. The lungs have been pulled away from 

 the median line, and a part of the right lung has been cut away to display the air-ducts and bloodvessels. 



