

STRUCTURE OF LYMPHATIC GLANDS. 199 



These lymph glands occur in groups in the flexures of the 

 limbs, the recesses of the neck, and the thoracic and abdominal 

 cavities, a large number being placed in the mesentery, in the 

 course of the intestinal lacteals. 



In the submucous tissue of the intestine there is much of this 

 lymphoid tissue, arranged in numerous small follicles, which, 

 doubtless, have a similar function to the lymph glands found 

 elsewhere. 



FIG. 85. 



c 



Section through the central or medullary part of a Lymphatic Gland, showing ade- 

 noid tissue (a) containing capillaries (6) and a fibrous trabecula (c) containing an artery. 

 (Cadiat.) 



There are various modes of origin of the lymphatic vessels 

 which are more or less characteristic of the different parts in 

 which they occur. 



In the connective and allied tissues there are variously-formed 

 fissures or splits, which can be filled with fluid forced into the 

 tissues by puncturing the skin with the nozzle of a fine syringe, 

 such as is used for hypodermic injection. 



These fissures contain the protoplasmic units of the tissue, and 



