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. 



■The Structure of Nervous Tissue. (Landois.) 



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

 lated fibre, with Schwann's sheath: C, neurilemma; 1,1, Ranvier's nodes; 1>, white substance of 

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

 fibre ; g, nerve-fibre acted on with silver nitrate: I, multipolar 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, n, straight process : in, sheath. 



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

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

 polar cells, but are concerned in bringing in communication other 



