

• 



^ 



73 



74 



75 



76 



77 



• i 



78 



79 



80 



81 



( -^ 



82 



83 



#' #3 • 



84 



85 



86 



87 



FiGUiiES 73-87. — T 

 Figures 73, 74: Normal throinbocyies. 



73 A typical thrombocyte. 



74 A variation from the tyjiical toward the reactive 

 tlirombocyte type. 



Figures 75-79: Devdopmcnlal stages fowid in thecirculaiing 

 blood. 



75 Stage about midway in the differentiation process. 



76 Early elongation stage. Cytoplasm about the same 

 as in preceding cell. Specific granule present. 



77 Early elongation, beginning rarefaction. Two 

 specific granules present. 



78 Thrombocyte character definitely established. 

 Lightly stained cytoplasm. Granulation still very 

 faint. 



79 Nearly mature thrombocyte. 



irombocytes. 2,470 X. 



Figures 80-84: Reactive ihrombocytcs. 



80 Multiplication of specific thrombocyte granules to 

 form a sphere. 



81 Multiplication of specific thrombocyte granules to 

 form spheres. 



82 Vacuolization of cytosome and presence of two 

 irregular spheres. 



83 Aggregation of specific thrombocyte granules around 

 vacuoles of various sizes. 



84 Numerous faint spheres and large, dark granules. 



Figures 85-87: Stages in disintegration of the thrombocyte 

 when exposed to air. 



85 Early stage of disintegration of the cell membrane. 



86 Mid-stage of disintegration. 



87 Late stage of disintegration. Specific granule still 

 visible. 



38 



