LYMPH GLANDS. 



The follicles of the lymph gland consist of a dense, more or 

 less spherical mass of lymphocytes. At its periphery next to the 

 lymph sinus these cells are much crowded together, while in the 

 centre there is always a more or less clear space where the 

 lymphocytes are much less abundant. Here there are usually 

 found an artery and one or more veins. By close observation 

 karyokinetic figures may nearly always be found in this region. 



FIG. 95. 



. 



Fat 





Lymph 

 sinus 



, jfo? *'."' Trabecula 

 Illood- 



Germinal 

 'centre 







From the cortex of a dog's lymph gland. - 1."0. 



According to Flemming, the reproduction of lymphocytes takes 

 place in the centre of the follicle, and this area is known as the 

 germinal centre (Keimcentrum) (Fig. 95). 



The afferent lymph-vessel enters the gland usually at one 

 pole, and after dividing passes through the capsule. Its walls 

 become always thinner until, on forming the lymph sinus, they 



