Left Ant. Caval vein .Right Ant Caval vein 



Remnkfr //7J7JZ+- Preqanqlionic rreurtin 

 Ganglion in///////// ' /Postonnnlinmr 



Postganglionic neuron 



^Auricular sfeptum 



^^$^^yvpengfrom /) 



: ^^^^^^ /W5 ^ a ^ /c/e yy/-^-5^ of 



*^^> f^v** 



Ventr/de 



Ho oh from 



Inf. Vena cava- 



vonBezotd's Ga 



in Auricular septum 



'Bidder's 



laaers udngnon 



in auricula-ventricular junction 





- ^Stimulating electrodes 

 , in sino-auricular junction [Crescent] 



Sympathetic fibres- (Jotted lines 



Fig. 68. Diagram to show the innervation of the heart in the frog or turtle. The electrodes 

 are represented as applied to the white crescentic line where they will stimulate some postganglionic 

 fibers. (From Jackson.) 



