FIG. 44. PHAGOCYTOSIS MACROPHAGES. 



A smear of peritoneal exudate from a guinea-pig twenty-four hours after injec- 

 tion with 3 c.c. of a 5 per cent, suspension of pigeon's blood. Note that the corpuscles 

 (nucleated) are being ingested by the large endothelial cells of the peritoneum. 



TIG. 45 . PHAGOCYTOSIS MACROPHAGES. 



A smear of peritoneal exudate from the same guinea-pig forty-eight hours after 

 injection with pigeon's blood. Note the large numbers of corpuscles ingested by the 

 endothelial cells. In most instances the corpuscles have undergone digestion, the 

 nuclei being more resistant. These nuclei are shrunken, and in some instances are 

 broken up. The extracellular red blood-corpuscles are swollen and stain lightly. 



