394 



ANATOMICAL TECHNOLOGY. 



Preparation cf Fig. io8. — The vagus and sympatliic, together with the arteries, were 

 isolated as directed above (g 1008). The left cardiac nerves from the thyroid and vertebral 

 ganglia frequently pass ventrad of the vagus, as shown in Fig. 107, and those of the right 

 side often i)ass to the heart along the ventral side of the blood vessels instead of as here 

 shown ; see Quaiu, A, I, 633. 



The figure is meant to illustrate the origin and course of the recurrent laryngeal nerve 

 on the two sides — (A) representing the right side, with the recurrent winding around the 

 A. subclavia dextra, and (B) the left side, with the recurrent nerve winding around the 

 arch of the aorta. 



Fig. 108. — The Recukkent Laryngeal Nerves, Ventral View, (Stowell, 1) ; 



X about 1. 



Explanation of Fig. io8. — The abbreviations are the same in the two figures. 



Aorta, az. (§ 926). A. brcph., A. brachio-cephalica, az. (§ 943). A. subcl., A. sub- 

 clavia (§ 933). A. carotid., A. carotidea. A. stern., A. sternalis s. mammaria 

 interna. G. vert., Ganglion vertebrale (§ 1043). G. thyr., Ganglion thyroideum 

 (j: 1043) N. vagus (§ 1030). N. 1. r , N. laryngeus recurrens (§ 1038). 



NERYUS SYMPATHICUS s. SYMPATHETICUS. (Fig. 90, 101, 

 103, 105, 107, 108, 109). 



References.— Quain, A, I, 626; Gray, A, 696; Hyrtl, A, 572; Gegenbaur, A, 522; 

 Chauveau, A, 328 ; Chauveau (Fleming), A, 781 ; Gurlt, A, 767, 774 ; Owen, A, III, 181 ; 

 Milne-Edwards, A, II, 331 ; Leyh, A, 550. 



§ 1042. The sympathic nervous system as a whole comprises a central system con- 

 sisting of a double chain of ganglia extending along the ventral side of the spinal column. 

 The two chains also extend into the head and into the tail. The ganglia are connected by 



