The Blood and the Lymph. 



Lymph 



The Cells of the Body live in Lymph. The cells of the 

 tissues are bathed in the lymph which fills the spaces in 

 the connective tissue (and 

 there is connective tissue in 

 all the organs of the body), capillary 

 as water may fill the spaces 

 left between stones built into 

 a wall. The cells get all 

 their nourishment from the 

 lymph, and into the lymph 

 they throw all their waste 

 matter. 



Oxygen 



Importance of Lymph. 

 We can see that the move- 

 ment and renewal of lymph 

 are as necessary as the circu- 

 lation of the blood itself ; is, 

 in fact, the most important 

 part of it. 



Food 



Muscle 

 ' Fiber 



Carbon 

 Dioxid 



Water 



Other 

 Wastes 



Fig. 51. Relation of Blood and Muscle. 

 (Lymph being Middleman.) 



Lymph Cavities or Serous Cavities. We have noticed 

 the pericardial liquid (page 50). There is also a small 

 quantity of similar liquid around the lungs in the pleural 

 cavities, and in the abdominal cavity, around the digestive 

 organs; also in the cavities of the brain. The liquid in 

 each case is lymph, and these cavities, often called serous 

 cavities, are lymph cavities. They communicate with the 

 lymph tubes. 



Dropsy. In health the amount of the liquid in these 

 cavities is small, but in certain disorders it may accumu- 

 late. In general, such affections are called "dropsy." 

 The lymph may also accumulate in the tissues of the 

 extremities, causing swelling of the limbs. 



