406 



THE ORGANS 



Lymphatics.— Lymph capillaries form networks among the alveoli 

 and terminal ducts. The lymph capillaries empty into larger lymph- 

 atics in the connective tissue. These in turn communicate with 

 several lymph vessels which convey the lymph to the axillary glands. 



Nerves.— Both cerebro-spinal and sympathetic nerves supply the 

 gland, the larger trunks following the interlobar and interlobula 



ST.. 



n 



n 



A 



/ 



X » -\ 



^^^^^<^^,, rr\ 



n 



B 





Q) 





/" ^ 



C 



Fig. 287. — -^j Mammary gland cells — secreting stage; B, same — excreting stage; the 

 secretion having separated from the cells; C, resting stage; ?i = nucleus. e = ergasto- 

 plasm filaments. ^ = droplets of secretion. (Simon.) 



connective-tissue septa. The nerve terminals break up into ple.xuse 

 which surround the alveoli just outside their basement membranes. 

 From these plexuses delicate fibrils have been described passing 

 through the basement membrane and ending between the secreting 

 cells. 



