THE BLOOD. 



65 



cells which are lost in the formation of pus, worn-out cor- 

 puscles are sent to the spleen and the liver to be disinte- 

 grated. That these white corpuscles may take part in the 



a.L. 



\ 



tr. 



Fig. 15. LYMPHATIC GLAND, DIAGRAMMATIC SECTION. (After Sharpey.) 

 , I, lymphatic running- into gland; e, I, same issuing; C, connective tissue capsule; 

 M, tr, connective tissue ground work; I, s, lymph space; corpuscles indicated in part of 

 gland only. 



formation of new tissues and so, becoming differentiated, 

 become muscle or connective tissues, or whatever tissue 

 needed, is stated by many observers but denied by others, 

 and future investigation must settle the dispute. The rela- 

 tion of these corpuscles to the coagulation of blood is men- 

 tioned in the discussion of that process. 



THE BLOOD PLATES. 



Recently attention has been called to a third corpuscle of 

 the blood, the blood plates, blood tablets, or blood plaques. 

 These are corpuscles much smaller than the red corpuscles, 

 are pale or colorless, and in shape vary from the round to 

 the decidedly oval form. Their number has been given by 

 5 



