THORACIC CAVITY 41 



The Vena Azygos. The azygos vein enters the thorax 

 through the aortic aperture of the diaphragm, to the right of 

 the aorta and thoracic duct, the lower parts of which will be 

 displayed as the vein is cleaned. After entering the thorax 



Right common carotid artery Sterno-thyrepid muscle 

 Vagus nerve | | Sterno-hyoid muscle 



Right lung 



Fifth rib and transverse pro- 

 ; of sth thoracic vertebra 

 C 



Right bronchus 

 pulmonary artery . 

 Superior vena cava- 



D 



Left atrium 



Fossa ovalis 



Valve of inferior 

 vena cava 



Head of tenth rib 

 Inferior vena cava 

 Eleventh thoracic vertebra 

 Right crus of diaphragm 



Epiploic foramen 



Left renal vein 

 Right renal artery 



Vertebral artery 



Right superior intercostal artery 



Right vertebral vein 

 Sterno-clavicular interarticular disc 

 - Right innominate vein 

 .. First costal cartilage 

 Left innominate vein 



Ascending aorta 



Right lung 



u Auricle of right atr 



Fourth right costal cartilage 

 Right coronary artery 



- Fifth right costal cartilage 

 *D 



--Margin of atrio-ventricular 

 orifice 

 Opening of coronary sinus 



- Right ventricle 



Right lung 



Eighth right costal cartilage 



Right hepatic vein 

 Liver 



Right branch of portal vein 



, - Bile duct 



A Junction of superior and 



i.. descending parts of 



i duodenum 



. . Transverse colon 



u Bile duct 



FIG. 15. Sagittal section and partial dissection of the upper part of the 

 trunk of a young Male Adult. The section is to the right of the median 

 plane along the line of the superior and inferior venae cavae and it 

 passes through the right margin of the left atrium of the heart. The 

 atria were partially distended and the ventricles were contracted. 



A-A. Plane of section of Fig. 22. 



B-B. ,, 23. 



C-C. ,, ,,20. 



D-D. ,. 21. 



the vein ascends along the right side of the aorta, from 

 which it is separated by the thoracic duct. A short distance 

 above the diaphragm it passes more or less completely behind 

 the right border of the oesophagus. At the lower border of 

 the root of the lung it emerges from behind the oesophagus, 



