LTMPIT. QI 



Body, but especially in the red marrow of bones (p. 88). 

 In the embryo the liver, and in new-born animals the con- 

 nective-tissue corpuscles (p. 105), form new red blood cor- 

 puscles. 



How long an individual red corpuscle lasts is not known, 

 nor with certainty how or when it disappears. There is, 

 however, some reason to believe that a great many are de- 

 stroyed in the spleen (see Chap. XXII.). 



Chemistry of Lymph. Lymph is a colorless fluid when 

 pure, feebly alkaline, and with a specific gravity of about 

 1045. It may be described as blood minus its red corpuscles 

 and much diluted, but of course in various parts of the 

 Body it will contain minute quantities of substances de- 

 rived from neighboring tissues. It contains a considerable 

 quantity of carbon dioxide gas which it gives up in a 

 vacuum, but no oxygen, since any of that gas which 

 passes into it by diffusion from the blood is immediately 

 picked up by the living tissues among which the lymph 

 Hows. 



