76 



THE ESSENTIALS OF HISTOLOGY 



spherical, with a single large and distinct nucleolus. The shape 

 depends a good deal on the number of processes, and the manner 

 in which they come off from the cell. If there is but one process, 

 the cell is generally spherical. This is the case with the cells of the 



sh 

 FIG. 91. CELL FROM A SPINAL GANGLION. 



ih, nucleated sheath of the cell ; n, ', the nerve-fibre which the single process of the cell, 



after a number of coils, joins. 



FIG. 92. GANGLION-CELL OF A 

 FROG, HIGHLY MAGNIFIED. 



a, a, straight fibre ; b. b. coiled fibre ; 

 c, smaller one joining it. 



FlG. 93. A GANGLION-CELL WITHIN ITS 

 SHEATH ; FROM THE HUMAN SYMPATHETIC. 



(Highly magnified.) 



spinal ganglia (fig. 91) ; in these the single process, after a short 

 course, joins one of the nerve-fibres which is traversing the ganglion. 

 When there are two processes, they often go off in opposite directions 





