? 



'*' 



PLATE XI. LEUCOCYTES AND PHAGOCYTES 



I. Shows a leucocyte or white blood cell with its irreg- 

 ular shaped nucleus and the translucent delicate cell-body. 



2. Shows a leucocyte which has taken into its body 

 particles of soot, breathed in by its owner from dusty air. 

 This leucocyte is thus, for the time being, a phagocyte. 



3. This phagocyte has taken into its body several bac- 

 teria micrococci a few of which have been partially de- 

 stroyed. 



4- This is one of the larger phagocytes of the body 

 which has in its interior, portions of other smaller dead cells. 

 These are here undergoing disintegration. 



