LYMPH AND LYMPHATIC GLANDS. [CH. xxn. 



part of the capsule covering the convex or outer part of the 

 gland ; they have a structure similar to that of the capsule, and 

 entering the gland from all sides, and freely communicating, form 

 a fibrous scaffolding. The interior of the gland is seen on 

 section, even when examined with the naked eye, to be made up of 

 two parts, an outer or cortical, which is light coloured, and an 

 inner or medullary portion of redder appearance (figs. 292, 293). 

 In the outer part, or cortex, of the gland (fig. 293) the intervals 

 between the trabeculse are large and regular ; they are termed 



ir. 



Fig. 293. Diagrammatic section of lymphatic gland, a.l., afferent ; t.l., efferent lympha- 

 tics; C, cortical substance; l.h., lymphoid tissue; '.., lymph-path; c., fibrous 

 capsule sending in trabeculse tr. into the substance of the gland. (Sharpey.) 



alveoli ; whilst in the more central or medullary part is a finer 

 meshwork formed by an irregular anastomosis of the trabecular 

 processes. Within the alveoli of the cortex and in the meshwork 

 formed by the trabeculaa in the medulla, is contained lymphoid 

 tissue ; this occupies the central part of each alveolus ; but at the 

 periphery, surrounding the central portion and immediately next 

 the capsule and trabeculse, is a more open meshwork of retiform 

 tissue constituting the lymph-path, and containing but few lymph- 

 corpuscles. At the inner part of the alveolus, the central mass 

 divides into two or more smaller rounded or cord-like masses 

 which, joining with those from the other alveoli, form a much 



