NERVOUS TISSUE. 



99 



(b) Dendrites (protoplasmic processes) develop later than 

 the axones. In Golgi preparations they appear much branched 

 and with irregular outlines. Their margins are not smooth 

 like those of the axones, but are covered with small elevations 

 (Fig. 70). The terminal branches of the dendrites are called 

 telodendria (Fig. 69). 



FIG. 



Teloriendrion 



Dendrite 



Pyramidal cell from the cerebral cortex of the human adult. 



A. Bochenek.) X 150. 



(After a preparation by 



One may divide nerve cells according to their processes into 

 uni, bi-, and multipolar cells. There is always an axone, but 

 the number of dendrites varies. 



Unipolar cells are relatively rare. They are found in the 

 nervous system of invertebrates, in the sympathetic ganglia of 

 amphibians, in the olfactory sense cells, and in the spinal gan- 

 glia of mammals. In these the axls-tfylind^L process divides 



