ON CIRCULATION AND NUTRITION 177 



cells, according to the manner of innervation of its various 

 textures, called, respectively, neuro-sympathetic,and neuro- 

 systemic, according to which division of the nervous system 

 they belong. We therefore, further, feel warranted in 

 venturing the opinion, that these two systems of innerva- 

 tion being the producers, and circulators, of nerve force, 

 along definite lines, and through definite structural channels, 

 are likewise the distributing and circulating media of the 

 tissue protoplasm, or pabulum, along, and through, the 

 same channels, in virtue of their absolutely ubiquitous 

 inter-cellular and intra-cellular distribution, and continuity 

 of lumens, and' texture. Thus, we are enabled to perceive 

 that each endothelial cell of the total capillary vasculature 

 becomes a means whereby the nutritive pabulum is removed 

 from the blood circulation and conveyed by its processes 

 of attachment and inter-communication to distant cells, 

 and groups of cells, and fibrous textures, and organs, by 

 direct continuity of histological development, and vital 

 oneness of organic structure, and function. We take it, 

 therefore, that the principle of circulation is still in opera- 

 tion, in effecting the conveyance of the nutritive plasma 

 from the blood, to the tissues, and that we must grant to 

 the cell and fibre elements involved, the possession of 

 miniature capillary channels, and energy, enough, albeit 

 nervine, to effect the required circulatory movements, 

 under the selecting and distributing supervision of the 

 sympathetic nerve economy, until the final act of tissue 

 nutritive assimilation is accomplished, and the integrity of 

 the tissue elements made good all which is effected, on 

 lines calculated to secure purity of nutritive material, and 

 to obviate effete admixture, or auto-intoxication, in the 

 all-important process of nutrition. 



Nutrition having been thus effected by cell, and fibre, 

 selection, circulation, and distribution, and the final meta- 

 bolic changes in the integrative disposal of the tissue plasma 

 having taken place, we may be prepared to find that the 

 integrated material, after a longer, or shorter, period of 

 textural detention, or, until tear, and wear, have done 

 their work, resumes, or continues, its course of circu- 

 latory movement, by being disintegrated, and shed, into 

 the rudimentary " effete lymph " inter-spaces of the 



M 



