ON NERVINE SECRETION 



81 



materials, or such as find their way along that side of the 

 systemic nervous system. Here the general lymphatic 

 circulatory system, as distinguished from the cerebro- 

 spinal lymph circulatory system, takes up the function ot 

 removal or scavenging, of the materials so excreted, as 

 well as of those resulting from muscular action and tear 

 and wear, and, combining them, removes them to the 

 great blood stream for final disposal the lymph spaces, 



FIG. 15. 



FIG. 16. 



FIG. 15. MAGNIFIED VIEW OF A SWEAT GLAND, WITH ITS DUCT. (Wagner.) 



a, the gland surrounded by fat-cells ; b, the duct passing through the corium; c, its 

 continuation through the lower, and d, through the upper part of the epidermis. 



FIG. 16. DEVELOPING SWEAT GLANDS FROM A SEVEN MONTHS' FOETUS. 

 Magnified 50 diameters. (Kolliker.) 



a, horny layer of the epidermis; b, Malpighian layer; ti, rudimentary gland; e, 

 lumen of the duct, opening at /"upon the surface of the skin. 



channels, vessels, and glands of the lymphatic circulation 

 proper, each contributing their " quota " of conveying and 

 sorting of the refuse material. 



The distribution of the systemic motor nerve fibres and 

 fibrils, as well as the sympathetic motor filaments, is 

 virtually to every muscular fibre and fibril in the body, 

 whether striped, or unstriped, and suggests, as elsewhere 

 stated, the thought that these motor nerve fibrils might 

 convey to the sarcous elements of the muscular system 

 universally, nutritious material, as well as force, or impulse, 



