FIGURE 170 



170 RecoiKst ruction (if let I va.sL'ular runiplex of lower cervical and upper 

 thoracic regions of a 15 mm. cat embryo (series 218, slide VIII, sections 25 to 

 44; slide IX, sections 1 to 48; slide X, sections 1 to 48; slide XI, sections 1 to 

 48; slide XII. sections 1 to 48. X 225), dorsal view. 



1 Sympathetic nerve. 



'i' Right azygos vein. 



3 Right precava. 



6 Left precava. 



6' Left azygos vein, thoracic |)orlion. 



7 Aorta. 



10 Puhnonary artery. 



12 Jugular lymph sac, thoracic duct approach. 



16 Dorso-medial somatic venous tributaries. 



22 Vagus. 



24 Thyrocervical artery. 



33 Left subclavian artery. 



35 Thoracic duct, preazygos segment. 



35' Detached lymphatic space in path of jireazygos channel. 



37 Broncho-mediastinnl duct. 



41 Vertebral artery. 



42 Vertebral vein. 



45 Innominate artery. 



46 Left superior intercostal \-eiii. 



53 Precaval lymphatics. 



54 Fifth spinal nerve. 



55 Sixth, seventh and eighlli sjiinnl iiervt 



56 Ductus arteriosus Hot alii. 



57 llight subclavian artery. 



