134 NORMAL HISTOLOGY AND ORGANOTHERAPY. 



usually enlarges many times the normal size, far in 

 advance of the seat of infection. This is due to the 

 absorption of the toxins. Thus the lymph nodes in 

 the groin enlarge from an infection in the toe, those 

 in the axilla from an infected finger, and those of the 

 neck from a bad tooth. If these barriers break down 

 the infection becomes systemic, a condition known in 

 a general way as blood-poisoning. 



Artery to one of 

 the ten com- 

 partments. 



Intralobular \ 

 artery. 



\ 



Interlobular 

 trabecula. \ 



l 



Intralobular L_ 

 trabecula. \ 



| \ 



Malpighian 

 corpuscle. [ m | 



Intralobular 



venous spaces. 

 Intralobulor 

 vein. 



Ampulla, of 

 Thoma. 



Spleen pulp cord. 

 Interlobular -vein. 

 1 nt rf ilobular vein. 



Fig. 98. Diagram of lobule of the spleen (Mall). 



The function of the thymus gland is not known. 

 Since its structure resembles the tissue of a lymph 

 node it is reasonable to suppose that it has a like 

 function. Recently structural changes have been 

 observed in this organ in epileptics, but whether 

 these changes are a cause or a consequence of the dis- 

 ease is not known. 



The lymphoid tissue of the spleen no doubt 



