The Blood and the Lymph. 



79 



ous around a wound. They seem to help in repairing 

 tissues. 



White Corpuscles 



HIGHLY MAGNIFIED 



White Corpuscle ...:.: 



Red Corpuscles 

 in Rolls 



MODERATELY MAGNIFIED 

 Fig. 48. Red and White Corpuscles of the Blood. 



The Plasma. The plasma consists chiefly of water, 

 having in solution various salts, including common salt ; 

 it also contains the nourishing materials for the tissues. 

 These nourishing materials, obtained from the food by 

 digestion, consist chiefly of proteids, fats, and sugar. The 

 plasma also contains waste matters from the working tis- 

 sues on their way out of the body. 



The Color of Blood. The difference in color of a single 

 corpuscle and the blood in the mass may be better under- 

 stood by comparing it with something that we see more 

 frequently. A tumbler of currant jelly has a rich, red 



