QUANTITY AND COMPOSITION OF THE BLOOD IN MAN 909 



BLOOD OF A MAN TWENTY-FIVE YEARS OF AGE 

 One thousand Grammes of Blood contain 



513-02 Blood corpuscles. 



Water 349-69 



Substances not vaporising at 



120 C 



Haematin 



' Blood-casein,' etc. . 



Inorganic constituents 



Chlorine 

 Sulphuric acid 

 Phosphoric acid 

 Potassium 

 Sodium . 



Phosphate of lime . 

 Phosphate of magnesium 

 Oxygen . 



163-33 



7-70 



151-89 



3-74 



0-898\ 



0-031 



0-695 



1-586 



0-241 / 



0-048 



0-031 



0-206/ 



(including 0-512 iron) 

 (excluding iron) 



Chloride of potassium 

 Sulphate of potassium 

 Phosphate of potassium 

 Phosphate of sodium . 

 Sodaj 



Phosphate of lime 

 Phosphate of magnesium 



Total 



486-98 Interstitial Fluid (Plasma). 

 Water ... . 439-02 



Substances not vaporising at 



120 . . 47-96 



Fibrin . 



' Albumen,' etc. 



Inorganic constituents 



Chlorine 

 Sulphuric acid 

 Phosphoric acid 

 Potassium 

 Sodium . 



Phosphate of lime . 

 Phosphate of magnesium 

 Oxygen . 



3-93 



39-89 



4-14 



1-722^ 

 0-063 

 0-071 

 0-153 

 1-661 

 0-145 

 0-106 

 0-221 



Sulphate of potassium 



Chloride of potassium 



Chloride of sodium 



Phosphate of sodium . 



Soda 



Phosphate of lime 



Phosphate of magnesium 



Specific gravity 



Total 

 1-0599 



1-887 

 0-068 

 1-202 

 0-325 

 0-175 

 0-048 

 0-031 



3-736 



0-137 

 0-175 

 2-701 

 0-132 

 0-746 

 0-145 

 0-106 



4-142 



THE PROTEINS OF THE PLASMA 



The plasma is generally described as containing a number of different 

 proteins belonging to the class of coagulable proteins. No albumoses or 

 peptones are present. Since the plasma in clotting gives rise to fibrin 

 and serum, we may divide its protein constituents into those which are 

 the precursors of fibrin arid those which are still contained in the serum. 



The Precursors of Fibrin. Most of these have been dealt with in 

 discussing the causation of coagulation. It remains for us here only to 

 mention some of the chemical features of fibrinogen and its product 

 fibrin. Fibrinogen is best separated by Hammarsten's method, namely, 

 half-saturation with sodium chloride, or by the use of ammonium sulphate. 



