REGION OP THE NAPE OF THE NECK. 105 



veins, the trachea, oesophagus ; and, in the groove sepa- 

 rating them, the recurrent laryngeal nerves ; and on the 

 left side the thoracic duct. At the sides the internal 

 mammary vessels, the innominate veins, and on the right 

 the innominate artery, with the vagus nerve lying be- 



Median Line. 1. Sterno-hyoid muscles. 2. Sterno-thyroid muscles. 3. Re- 

 mains of thymus gland. 4. Trachea. 5. (Esophagus. 6. Longi colli muscles. 

 LeftSide. 7. Internal mammary artery. 8. Innominate vein. 9. Phrenic nerve. 

 10. Vagus uerve. 11. Recurrent laryngeal nerve. 12. Cardiac nerves. 13. Left 

 carotid artery. 14. Left subclavian artery. 15. Thoracic duct. 16. Apex of lung 

 and pleura. 17. Sympathetic. 18. Superior intercostal artery. 19. First dorsal 

 nerve. Right Side. 20. Internal mammary artery. 21. Innominate vein. 22. 

 Phrenic nerve. 23. Vagus ne"rve. 24 Cardiac nerves. 25. Innominate artery. 

 26. Apex of lung and pleura. 27. Sympathetic. 28. Superior intercostal artery. 

 29. First dorsal nerve. (HEATH.) 



tween it and the innominate vein, and on the left the 

 common carotid and subclavian arteries, with the vagus 

 between them, the phrenic and cardiac nerves, the trunk 

 of the sympathetic, the longi colli muscles, and the su- 

 perior intercostal arteries and first dorsal nerves. 



