Till I l. 



or the polynuclear leuci with neutral-stainii I 



comprise from Bfl to To | i of the total com • 



Another type of white ••••II is known as th< 

 it was supposed to represent an intermedial 

 and polynuclear cells. Probably Buch transitions do 

 transitional leucocyte is related to the mononuclear ■ 



The polynuclear <-••! U originate in the bone n 

 reason have been termed myeloid cells. rom c< 



the bone marrov termed myeloblasts, which arc nongranular and c 

 tain a large nucleus. In the course of development the cha 

 granules appear, and the nucleus remains round and later b< 

 tabulated. These intermediate forms died myel< 



nuclear cells originate in the lymphatic tis if the body. 



The leucocytes possess the ability to make ameboid moven 

 tu • foreign particles which may be presented to them. <>n 



count of this latt.-r ability they are commonly called phi a I 



the process of inflammation the leuc< semble at the spot wl 



the Beat of the injury or infection, and remove th< 

 or necrotic tissue bj ingesting and digesting it. 



It is not definitely known whether »>r not the lymphi 

 tion as phagocytes. Other functions besid< 



, ascribed to the white cells, but they are not as 

 cepted. The number of leucocytes in the blood is subject I 



siderable variation. They normally numbe 



per c mm. At the heighl of digestion and aft 



there is usually a small increase, and under pathological 



especially in infectious diseases, this I. S 



infections u the polymorphonuch while othei 



the lymphocytes. The t\ 



fully know n, nor are the function 



The Blood Platel- 



These are small oval particles about 3 p in diameter, w 



in large numb< i c mm in the hi 1 I 



po^ed to be formed Mom partich sm which 



off from the l.i '""1 cells in the I marrow 



and chemical propeii understood, 



very important role in tho llation of the bloi 



