FLOW OF BLOOD IN MESENTERIC VESSELS 



'453 



available and stated that it does not warrant the 

 conclusion that pancreatic secretion is dependent 

 on the blood supply, except that a minimum flow is 

 required to maintain cellular activity and provide 

 fluid for secretion. 



The relation between motor activity and blood 

 flow in the stomach and intestine have been referred 

 to earlier. Vigorous contractions, such as are pro- 

 duced by vagal stimulation, cause a reduction in 

 blood flow. On the other hand, a reduction in blood 

 flow may, as suggested by Celander (34), be re- 



sponsible for the usually observed inhibition of 

 motility during sympathetic stimulation. 



The best general conclusion seems to be that there 

 is as yet no clearly established demonstration that 

 the mesenteric organs need an augmentation of their 

 basal blood supply to perform their alimentary func- 

 tion. It seems clear that these organs receive their 

 proportionate share of the general rise in cardiac 

 output which follows feeding, but whether this is 

 coincidental or to satisfy an essential requirement is 

 debatable. 



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