THE DIGESTIVE SYSTEM 11 



inconvenience in sucking. It is usually relieved by the 

 topical application of properly selected antiseptics. 



Tumors 



Labial tumors are not of common occurrence in 

 swine, although fibroma, myxoma, and epithelioma have 

 been observed. 



TONGUE 



The tongue is also subject to injuries of various 

 types. Tongue injuries may be inflicted by improper 

 food, by foreign bodies in the food, or by sharp, irregular 

 teeth. 



Fig. 1. GLOSSITIS. 



This tongue was taken from an apparently normal hog. It contained 

 twenty-four polished nails lodged in one place. 



Glossitis 



Inflammatory disturbances of the tongue may involve 

 the mucous membrane only or the submucous muscular 

 portion of the tongue. The inflammations of the lingual 

 mucous membrane are practically identical with those of 

 the lips and will not be given further consideration. 

 Inflammation of the lingual musculature is usually the 

 sequel of an injury which had provided an avenue of 

 entrance for infection. Inflammation of the substructures 

 of the tongue may be acute or chronic, diffuse or cir- 



