114 



THE ESSENTIALS OF HISTOLOGY 



The sweat-glands are developed, like the hairs, from downgrowths 

 of the Malpigkian layer of the epidermis into the corium, the rudi- 



FIG. 138. SECTION OF A SWEAT-GLAND IN THE SKIN OF MAN. 



o, a, secreting tubes in section ; 6, a tube seen from above ; c, c, efferent tubes ; d, inter- 

 tubular connective tissue with blood-vessels. 1, basement membrane ; 2, muscular 

 fibres cut across ; 3, secreting epithelium of a tubule. 



ments which are thus formed becoming eventually coiled up at their 

 extremities and converted into hollow tubes. 



The sweat-glands receive nerve-fibres, and each gland has a special 

 cluster of capillary blood-vessels. 



