clxxxviii LYMPHATIC SYSTEM. 



(His), or the lymph- channel. It is traversed by retiform connective tissue 

 (fig. cv. c c), in which the nuclei of the spindle-shaped or ramified cells are 

 mostly apparent, and is filled with fluid lymph, containing many lymph- 

 corpuscles, which may be washed out from sections of the gland with a hair 

 pencil, so' as to show the sinus, while the firmer gland-pulp, which the sinus 

 surrounds, keeps its place. The latter, the proper glandular substance, is 

 also pervaded and supported by retiform tissue, mostly non-nucleated (fig. 

 cv. a), communicating with that of the surrounding lymph-sinus, but 

 marked off from it by somewhat closer reticulation at their mutual 

 boundary, not so close, however, as to prevent fluids, or even solid cor- 

 puscles, from passing from the one to the other. This glandular pulp is 

 made up of densely packed lymph-corpuscles, occupying the interstices of 



Fig. GUI. 



* & B 

 Fig. CIII. SECTION OF A MESENTERIO GLAND OF THE Ox (magnified 12 diameters). 



The section includes a portion of the cortical part, A, in its whole depth, and a smaller 

 portion of the adjoining medullary part, B ; c, c, outer coat or capsule sending partitions 

 into the cortical part to form alveoli, and trabeculse, tt, which are seen mostly cut across ; 

 d d, the glandular substance forming nodules in the cortical part, A, and reticulating 

 cords in the medullary part, B ; ?, Z, lymph-sinus or lymph'shannel, left white (after His). 



its supporting retiform tissue, and is traversed by an abundant network of 

 capillary blood-vessels, which runs throughout the proper glandular pulp, 

 both cortical and medullary, but does not pass into the surrounding lymph- 

 sinus. Arteries enter and veina leave the gland at the hilus, surrounded, 

 in some glands, as already said, with a dense inclosure of connective tissue. 

 The arterial branches go in great part directly to the glandular substance, 

 but partly also to the trabeculse. The former end in the glandular capil- 

 lary network above-mentioned, from which the veins begin, and tend to the 

 hilus alongside the arteries. The branches to the trabeculte run upon these 

 bands, and are in part conducted to the coat of the gland to be there dis- 

 tributed ; some of them in an indirect way reach the glandular substance. 

 The blood-vessels of the gland-pulp are supported by its pervading retiforra 

 tissue, which is not only connected to them, but forms an additional or 



