PHYSIOLOGY OF THE NERVOUS SYSTEM. 



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cell, the white substance of Schwann being added after the separation of 

 the nerve-filament from the ganglion. 



FIG. 329. THE STRUCTURE OF NERVOUS TISSUE. (Landois.) 



1, primitive fibrilla ; 2, axis cylinder ; 3. Remak's fibres : 4, medullated varicose fibre ; 5, 6, medul- 

 lated fibre, with Schwann's sheath : C. neurilemma ; t, t, Ranvier's nodes ; h, white substance of 

 Schwann; d, cells of the endoneurium ; a, axis cylinder : x, myelin drops; 7, transverse section of nerve- 

 fibre ; 8, nerve-fibre acted on with silver nitrate : I. nvultipolar nerve-cell from spinal cord ; z, axial 

 cylinder process : y, protoplasmic processes to the right of it a bipolar cell : II, peripheral ganglionic cell, 

 with a connective-tissue capsule ; III, ganglionic cell, with, o, a spiral, and, w, straight process ; m, sheath. 



The branched processes of nerve-cells are not, as a rule, concerned 

 in the formation of other nerve-trunks except in the bipolar or multi- 

 polar cells, but are concerned in bringing in communication other 



