LYMPHATIC NODES OR GLANDS 



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LYMPHATIC NODES 



At numerous points along the course of lymphatic vessels they 

 penetrate small nodules of so-called lymphoid or adenoid tissue, 

 which have been termed lymphatic glands. They are frequently 

 microscopic; others attain the size of a large pea. They secrete 

 nothing, hence are not glands. They are somewhat sponge -like in 

 structure, and the lymph filters slowly through them. 



FIG. 77. A SMALL PORTION OF SPECIMEN SHOWN IN FIG. 76, MORE HIGHLY 

 MAGNIFIED (X 350). 



A, A, A. Large lymph-channel. 



B. Valve in the course of last. 



C, C, C. Lymph-capillaries in the more solid parts of the tendon. 



D. Endothelial cells upon which a large amount of silver has deposited. Failure to follow 

 the instructions for the staining frequently results in a like deposition of silver over the 

 whole surface. 



Most frequently several lymphatic channels enter one of these 

 larger nodes, while perhaps only a single channel leaves it. 



The histology of a lymph -node is not always easily compre- 

 hended by the student, and we have endeavored to make a diagram 



