136 



EXCRETION. 



FIG. 6. 



external membrane as the glandular coil, and is lined gener- 

 ally by two layers of cells of pavement-epithelium. 1 



In a section of the skin and 

 the subcutaneous tissue, involv- 

 ing several of the sudoriparous 

 glands with their ducts, it is 

 seen that the glandular coils are 

 generally situated at different 

 planes beneath the skin, as is 

 indicated in Fig. 6. 



Robin has described a vari- 

 ety of sudoriparous glands in 

 the axilla, which do not differ so 

 much from the glands in other 

 parts in their anatomy, as in 

 the character of their secretion. 2 

 The coil in these glands is much 

 larger than in other parts, meas- 

 uring from -V to -j 3 ^ of an inch ; 

 the walls of the tube are thick- 

 er, and present an investment of 

 fibrous tissue with an internal 

 layer of longitudinal, unstriped 



Sudoriparous glands, magnified twenty ^ _ ^ 



diameters. 1,1, Epidermis; 2, 2, MU- muscular fibres , and finally. 



cous layer ; 3, 3, Papillae ; 4, 4. Der- J ' 



ma; 5, 5, Subcutaneous areolar tissue; the tubes of the COll it Self are 

 6, 6, 6, 6, Sudoriparous glands ; 7. 7, 



lined with cells of pavement- 



vided. (SAPPEY, Tratte d' 'anatomie. cmitTiplinm Tlipv Jirp VPT*V mi- 

 Paris, 1852, tome ii., p. 466.) 1TU 



merous in the axilla, forming a 



continuous layer beneath the skin. Mixed with these glands 

 are a few of the ordinary variety. 



Estimates have been made by different writers of the 

 absolute number of sudoriparous glands in the body, and 



1 SAPPEY, Traite d'anatomie descriptive, Paris, 1852, tome ii., p. 468. 



2 ROBIN, Note sur une espece particuliere de glandes de la peau de Vhomme. 

 Annales dcs sciences naturelles, Zoologie, 3me serie, Paris, 1845, p. 380. 



3 KOLLIKER, Handbuch der Gewebelehre des Menschen, Leipzig, 1867, S. 140. 



