582 



GENERAL PHYSIOLOGY 



rdl-hody. 



\ ,,^ Dendrites. 



Nerce-'proc 



- Medullary aJieafh. 



■-— AxU-cylindir. 



—^^ Ncurilenwia. 



Ternuiial brmtc/u-- 



Fin. 282. — Scheme of a ncui'on ; a, free axis-cylinder ; b, axis-cylinder surrounded by neurilemma 

 alone ; c, axiB-cyliuder surrounded by the medullary sheath alone ; tl, axis-eylinder suiTOundcd 

 by the medullary sheath and the neurilemma, and divided intosegments by the nodes of 

 Kanvier. (From StiJhr.) 



