THE THORAX. 



217 



mon carotid and left subclavian veins, and (5) pericardium. Find (6) the vena 

 azygos major to the right, and (7) the aorta to the left. On each side find (8) 

 the pneumogastric nerves. Near the diaphragm find (9) the left pneumogastric 

 in front, (10) the right behind the oesophagus a result of rotation of the stomach. 

 The pneumogastric nerves (Fig. 153) have been thoroughly considered in 

 the dissection of the neck. Still, there are some practical relations of this nerve 



RIGHT RECUR- 

 RENT LARYN- 

 GEAL NERVE 



Transverse cervical 



artery 

 Right common carotid 



artery 

 Suprascapular artery 



Internal jugular vein 



PNEUMO GA STRIC 

 NERVE 



Subclavian vein 



Inferior thyroid vein 

 PHRENIC NER VE 

 Left innominate vein 

 Ascending aorta -J-^ 



|r 



Superior vena cava 

 RIGHT BRONCHUS 



Branch to superior lube 



of lung 



Upper branch of right 



pulmonary urti'ri/ 



Branch to middle lobe 



of lung 

 Right pulmonary vein 



RIGHT AURICLE 



Right coronary artery 

 Lower branch, of right 

 pulmonary atii'ri/ 

 THORACIC VERTEBRA 



Intercostal vein 



Intercostal artery 



Vena azygos major 



Intercostal vein 

 Intercostal artery __ 



Intercostal vein 

 Intercostal artery 



THYROID BODY 

 LEFT RECURRENT 

 LARYNGEAL 

 NER VE 

 PNE UMO GA S TRIC 



NERVE 

 Left internal jugular 



vein 

 Left common carotid 



artery 

 Left subclarian artery 



Left subclavian vein 



TRACHEA 



Inferior thyroid vein 



PHRENIC NER VE 



(hooked aside) 

 RECURRENT 

 LARYNGEAL 

 NERVE 

 PNEUMOGASTRIC 



NER VE 

 DUCTUS ARTERIOSUS 



Left pulmonary artery 



Pulmonary artery 



Right pulmonary 

 artery 



LEFT BRONCHUS 



Left coronary artery 



Upper left pulmonary 



. vein 

 RIGHT VENTRICLE 



(Conus arteriosiis) 

 Lower left pulmonary 



artery 

 Lvuier left pulmonary 



vein 



CESOPHAGUS 

 (hooked aside) 



THORACIC DUCT 

 Thoracic aorta, 



FIG. 153. THE ARCH OF THE AORTA, WITH THE PULMONARY ARTERY AND CHIEF BRANCHES OF 



THE AORTA. 

 (From a dissection in St. Bartholomew's Hospital Museum.) 



in the thorax I wish the student to understand. The pneumogastric nerve 

 leaves the cranium by the jugular foramen. You found it in the carotid sheath, 

 between the internal jugular vein and common carotid artery in the neck. The 

 two pneumogastric nerves differ in their relations somewhat, hence dissect them 

 separately. The right nerve (Fig. 15 3) crosses the right subclavian artery, and 

 at once gives off its recurrent or inferior laryngeal nerve, which passes upward 

 and inward, behind the subclavian and common carotid arteries, to the larynx, 

 15 



