116 GENERAL BIOLOGY 



cell. There are several kinds of processes. The axis cylinder process 

 already mentioned, which requires a sheath and becomes part of a nerve 

 fiber, and the protoplasmic processes, sometimes several in number, 

 which are shorter than the axis cylinder and usually branched. 



The cells themselves are designated as unipolar, bipolar, or multi- 

 polar, in accordance with the number of processes they may give forth. 

 Unipolar ganglion cells are found in the sympathetic ganglia. 



