72 PHYSIOLOGY. 



hollowed on both sides they are more accurately described 

 as biconcave. These corpuscles tend to gather side by 

 side, in rolls, like coins. They are cells without nuclei. 



The Colorless Corpuscles. In the open spaces be- 

 tween the rolls of colored corpuscles may occasionally 

 be found some spherical corpuscles. They are usually 



White Corpuscles 



HIGHLY MAGNIFIED 



White Corpuscle 



Red Corpuscles 

 in Rolls 



MODERATELY MAGNIFIED 

 Fig. 34. Red and White Corpuscles of the Blood. 



called the white corpuscles, but are better designated as 

 the colorless corpuscles, since the others have only a slight 

 color, and these have none. They usually have a dotted 

 appearance. It is not so easy to distinguish the two kinds 

 of corpuscles as it is in the case of the frog's blood, for the 

 two kinds are more nearly of the same size in the human 



