MINUTE ANATOMY OF THE LYMPHATIC GLANDS. 



335 



together with, in many animals as the horse, sheep, and ox a 

 considerable quantity of smooth muscular fibre (0. Heyfelder). 

 The processes which the sheaths give off towards the interior 

 of the lymphatic glands are at first flat septa, which, near the 

 centre, break up into cylindrical or subcylindrical cords, the 

 trabeculae, which ultimately become continuous with the con- 

 Fig. 62. 



Fig. 62. Section of the medullary substance of a lymphatic gland 

 from the Ox. a, follicular cord ; b, trabeculse ; c, path pursued by the 

 lymph ; d, bloodvessels. Magnified 300 diameters. 



nective tissue of the hilus. At the surface of the gland the 

 trabeculse are situated at a distance from one another, and 

 usually, in conjunction with the external sheath, enclose 

 alveolar-like spaces, in such a way that the latter are only 

 uninvested on the part looking towards the hilus. As they 

 divide into rounded cords, the trabeculse come into much closer 

 approximation ; the spaces which they invest are consequently 

 smaller than the alveoli, and at the same time are in much more 



