IV 



DIGESTION IN THE INTESTINE 



247 



These elegant experiments have been controlled and confirmed 

 by other workers, particularly by Wolff (1901-2) and Carvallo 

 (1907). The latter, at the Marey Institut in Paris, made some 

 interesting kinematographs of the progress of the food, from the 

 stomach through the intestines, in the frog. 



Vd 



FIG. 83. Schema to show distribution of sympathetic and vagus in gastro-intestinal tube and 



the posterior surface and great curvature of the stomach, with one or two fibres to the pancreas : 



i tic uui ftixi lauii ui tiic ^au^iiciueu cuiu g lvc uiigiu uu uiic gfonu BUUUIUIUUI ^uoy, aim ULUIG 



splanchnic (PS), which contain the greater part of the sympathetic nerve to the intestine, 

 after traversing the solar plexus (Pl.s), the superior mesenteric plexus (Ms), the inferior (Mi), 

 and the hypogastric plexus Up). 



i hypogastric plexus (Ip). 



The peristaltic movements, which depend on Auerbach's plexus, 

 and are therefore exhibited in excised loops, are also under normal 

 conditions regulated and controlled by the extrinsic nerves which 

 reach the intestine from the cerebrospinal and sympathetic systems. 

 The afferent nerve paths run principally in the great splanchnics 

 and the vagi. The schema of Fig. 83 is intended to illustrate the 



El 



