158 PHYSIOLOGY FOR IJEG1NNKKS < IIAI-. XHI 



In the nodules of the spleen the leucocytes multiply. This 

 is brought about by the division of a leucocyte into two, which 

 grow and in their turn divide. Some of these leucocytes pass 

 away from the spleen pulp by the veins. The spleen therefore, 

 like the lymphatic glands, supplies colourless corpuscles to the 

 blood. Some of the red corpuscles of the blood in their 

 passage through the spleen, probably those which are old and 

 worn out, are entangled in the spleen-pulp, where they undergo 

 change and gradually break up. The colouring matter of these 

 broken-up red corpuscles is carried away from the spleen 

 in the blood to the liver, and is used by the liver to make the 

 colouring matter of the bile. 



