i6 



THE SUPERIOR EXTREMITY 



below. About two-thirds of the gland are placed upon the 

 pectoralis major muscle, whilst the remaining part, which 

 corresponds to its inferior and lateral third, extends beyond 

 the anterior fold of the axilla, and lies upon the serratus 

 anterior muscle. From the part which lies in relation to the 

 lower border of the pectoralis major a prolongation extends 

 upwards into the axilla, and reaches as high as the third rib. 



Processes radiating out 

 from the corpus mammae 



\ 



Sinus lactiferus 

 Ductus lactiferi 



Pectoralis major 



Fat lobule 



FIG. 8. Section through a Mammary Gland prepared by the method 

 recommended by Sir Harold Stiles. 



The mamma is not enclosed in a capsule, and in that 

 respect it differs from many other glands. Its lobules and 

 lobes are embedded between strands of fibrous tissue which 

 pass through the superficial fascia from the skin to the deep 

 fascia. The strands form the stroma or framework of the 

 gland. They support and bind together the various parts of 



