CHAPTER XVII 

 MAMMARY GLANDS. DUCTLESS GLANDS 



THE MAMMARY GLANDS 



The mammary glands are placed between two layers of super- 

 ficial fascia in front of the thorax, occupying a space between the 

 third and sixth ribs, inclusive. They are covered by a layer of adi- 

 pose tissue and lie between two layers of superficial fascia. They 



FIG. 168. 

 Showing enlarged milk ducts during lactation. (Morris.) 



consist of little tubes, lined with milk-secreting cells and grouped 

 in small lobules, held together by connective tissue imbedded in 

 adipose. The lobules unite to form lobes, 18 or 20, each with its 

 own duct, thereby constituting a complete gland in itself; these 

 1 8 or 20 milk ducts (lactiferous ducts) approach the nipple and open 

 at its summit. The nipple is surrounded by a ring of darker 

 modified skin called the areola. A few small elevations are seen 

 on the areola; they are called the glands of Montgomery. 



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