APPLIED PHYSIOLOGY 



of the blood is a gland. The substance formed is called a 

 secretion. The epithelium of the gland does all the work 

 of secreting. All the mucous membranes of the body con- 

 tain glands which secrete 

 a 



mucus, and in addition 

 many contain glands 

 which secrete other sub- 

 stances. 



75. Sore mouth. 

 Babies sometimes suffer 

 with a form of sore mouth 

 in which white specks, like 

 curdled milk, appear upon 

 its mucous membrane. 

 The spots are due to a 

 kind of mold which 

 grows in milk. Gently 

 washing the mouth with 

 clean, warm water several 

 times a day will destroy 

 the mold and remove 

 the sores. 



76. Salivary glands. 

 The mouth contains a 



d 



Diagram of glands. 

 a epithelium upon the surface of a mucous 



cominued 



a Sim p,e 



tube. enters it from three tubes 



c the epithelium continued into a simple fa { ^ ach sali _ 



pocket. 

 d the epithelium continued into a series of vary tube, after it has 6X- 



tended into the flesh on 

 the face for an inch or 



so, abruptly divides again and again like the branches 

 and twigs of a tree. At the end of the smallest divi- 

 sions, there are minute pouches -^ of an inch in 



