n8 



ELEVENTH LECTURE. 



Both portions of the spleen tissue are, however, shoved 

 through each other ; it is, therefore, impossible to speak here 

 of a special, cortical, or medullary layer. 



We next examine the lymphoid follicle ; and here we again 

 meet with the old familiar reticular connective tissue, filled 

 with an excess of lymphoid cells, forming in the interior a 

 larger meshed, on the surface a more narrow meshed reticu- 

 lum. The capillaries of the interior are also readily recog- 

 nized. 



The tissue — we repeat — of the pulp strands (Fig. 112,0) 



112. —From the pulp of the human spleen brushed preparation (combination); a, pulp 

 with the delicate reticular frame-work ; b, transverse section of the caverni ; c, longitudinal 



Fig. 



Strand Wltll UlC LlCIIUdlU ICUtUlitl UdUlCV^UlK . t/, L! J 1 1.1 V^i SC 3CULIU11 KJl LIIC L4VCHI1 , L I ' ' I I ^ 1 I i 1 ' 1 1 1 I . I 



section of such a one; d, capillary vessel in a pulp tube dividing up at e ; f, epithelium of the 

 venous canal; g, side view of the latter ; h, its transverse section. 



arising from the surfaces of the Malpighian corpuscles pre- 

 sents, on the contrary, a considerable modification of the 

 reticular connective substance, of extremely fine delicate tex- 

 ture and with very small meshes, so that only one or a few 

 lymphoid cells find room in the latter. The surface of this 

 pulp tube preserves the same reticular character. If we 

 adjust the focus to the fundus of the caverni invested by them, 

 we find numerous transversely arranged fibres (c). These pas- 

 sages are lined with flat, spindle-shaped cells (/), which, 

 indeed, as the transverse section {b) teaches, have globular 

 nuclei. We have once more before us a vascular endothelium ; 



