VASCULAR NERVES FOR THE ABDOMINAL VISCERA 



223 



lungs is from the third to the fifth thoracic nerves, but that the vaso-constric- 

 tion produced is slight in comparison with regions of the systemic circulation. 





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The Vascular Nerves for the Abdominal Viscera. The vaso-con- 

 strictors and the vaso-dilators for the organs of the abdominal cavity have 

 a broad origin in the cord; from the first dorsal to the fourth lumbar in 

 the dog and cat. The nerves pass to the organs by the splanchnic nerves, 



