SALIVARY SECRETION. 45 



ity, another exists which is of very great importance for proper 

 digestion; this is the stimulation of the taste nerve endings, 

 and, for foods with a flavor, of those of the olfactory nerve in the 

 posterior nares. Such stimulation not only gratifies the appetite, 

 but it serves as the adequate stimulus to set agoing the secretion 

 of the gastric juice. Without any relish for food, digestion as 

 a whole materially suffers, and for this reason unpalatable food 

 is always more or less indigestible. 



