70 NERVOUS TISSUE. 



poles determines the name of the cell : thus a cell with one pole 



* * Sfc- ' 



m%mm&. 



p 



FIG. 74. Cross-section of neurotendinous nerve end-organ of rabbit, from tissue 

 stained in methylene-blue : m, muscle-fibers ; t, tendon ; c, capsule of neurotendi- 

 nous end-organ ; m n, medullated nerve-fiber (Huber and DeWitt, Jour, of Comp. 

 Neurol., vol. x..). 



is unipolar ; one with two poles, bipolar ; and one with three or 

 more, multipolar. 



Nucleus. 



r , Nucleolus. 



Fibrillar structure. 



Medullary sheath. 



FIG. 75. Bipolar ganglion-cell from the ganglion acusticum of a teleost (longi- 

 tudinal section) ; the. medullary sheath of the neuraxis and dendrite is continued 

 over the ganglion-cell ; X 800 (Bohm and Davidoff). 



The process in a so-called " unipolar" cell is, in reality, two 

 processes which have become united. Such cells occur in the 

 spinal ganglia (Fig. 78). 



