54 



A MANUAL OF PHYSIOLOGY 



Water 

 Solids 



Inorganic 

 Organic - 

 Proteids 

 Fats - 

 Cholesterin 

 Lecithin 



953'4 

 46-6 



40-1 



0-6 

 0-36 



The quantity of chyle flowing from the fistula was esti* 

 mated at as much as 3 to 4 kilos per twenty-four hours, or 

 nearly as much as the whole of the blood. The flow has 

 been calculated in various animals at one-eighteenth to one- 

 seventh of the body-weight in the twenty-four hours. The 

 quantity of lymph in the body is unknown, but it must be 

 very great perhaps two or three times that of the blood. 



The gases of the blood and lymph will be treated of in 

 Chapter III. 



The Fumtions of Blood and Lymph. 



We have already said that these liquids provide the 

 tissues with the materials they require, and carry away from 

 them materials which have served their turn and are done 

 with. These materials are gaseous, liquid, and solid. Oxygen 

 is brought to the tissues in the red corpuscles ; carbon dioxide 

 is carried away from them chiefly in the plasma of the blood 

 and lymph. The water and solids which the cells of the 

 body take in and give out are also, at one time or another, 

 constituents of the plasma. The heat produced in the 

 tissues, too, is, to a large extent, conducted into the blood 

 and distributed by it throughout the body. It is not known 

 whether the leucocytes play any part in the normal nutrition 

 of other cells, although it is probable that they exercise an 

 influence on the plasma in which they live ; but they have 

 important functions of another kind, to which it is necessary 

 to refer briefly here. 



Phagocytosis. Certain of the amoeboid cells of blood and 

 lymph, and the cells of the splenic pulp, are able to include 

 or 'eat up ' foreign bodies with which they come in contact, in 

 the same way as the amoeba takes in its food. Such cells are 



