CHAP, XI 



FOODS IN THE TISSUES 



141 



and so we find in the lymph all of the foods that occur 

 in the blood. Albumins, sugars, fats, water, salt, and 

 oxygen are all present in the right proportions. 



The cells give off their worn-out and waste materials 

 to the lymph. These are carbon dioxid, water, am- 

 monia compounds, and many other products in small 

 quantities. Some of these wastes may be of value else- 

 where in the body. The cells live in this liquid medium, 



Musc/e ce//s 



Lymjob 



FIG. 74. Showing the relation of blood capillaries to muscle cells anfl to 

 lymph capillaries (Zuppke). 



in which they find all the foods they need and to which 

 they can give all their useless and worn-out matter. 

 The lymph serves a very important purpose in the body. 

 107. The Cell. The foods found in the lymph are 

 taken into the cells and used for various purposes. The 

 albumins are used to repair the cells as fast as they are 

 worn out. The cells would wear out and die if we did 

 not eat enough proteid food stuffs to keep them repaired. 

 The albumins may also be oxidized and liberate heat 

 All growth is due to the albumins. 



