294 



SECRETION 



white fluid, without any oder, sweetish in taste, 

 alkaline in reaction, and has a specific gravity of 

 from 1.025 to 1.040. Examined microscopically it 

 presents a clear fluid called the plasma, which holds 

 in suspension great numbers of oil globules. The 



FIG. 108 



Nipple 



Lactiferous 

 duct. 



Ampulla. 



Loculi in connective tissue. 



Dissection of the lower half of the female breast during the period of 

 lactation. (From Luschka.) 



amount of milk secreted each day by a healthy woman 

 averages about 1200 c.c. Milk is the most important 

 of the animal foods, containing all the elements 

 necessary to properly nourish and develop the body, 

 and is used as a food. 



