FIGURE 183 



183 Same, slide X, section 22. 



1 Sympathetic nerve. 



8 Oesophagus. 



9 Trachea. 



12 .lu<!;iil;ir l.Niuph sac. tlioi'acic (hict approac-h. 



22 Vagus. 



23 Left carotid artery. 



33 Left subclavian artery. 



35 Thoracic duct, preazygos segment. 



40 Innominate vein. 



41 Vertebral artery. 



43 Costo-cervical artery. 



45 Iiinoiiiiiiate ait cry. 



