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HANDBOOK OF PHYSIOLOGY. 



composed chiefly of cells, imbedded in a matrix of fibres formed of the 

 branchings of large flattened nucleated endotheloid cells. The spaces of 

 the network only partially occupied by cells form a freely communicat- 

 ing system. Of the cells some are granular corpuscles resembling the 

 lymph-corpuscles, more or less connected with the cells of the mesh work, 

 both in general ap>pearance and in being able to perform amoeboid move- 

 ments; others are red blood -corpuscles of normal appearance or variously 

 changed; while there are also large cells containing either a pigment al- 

 lied to the coloring matter of the blood, or rounded corpuscles like red 

 blood-corpuscles. 



FIG. 264. 



FIG. 263. Section of dog's spleen injected: c, capsule; tr, trabeculee; m, two Malpighian bodies 

 with numerous small arteries and capillaries: a, artery, I, lymphoid tissue, consisting of closely- 

 packed lymphoid cells supported by very delicate retiform tissue; a light space unoccupied by cells 

 is seen all around the trabeculae, which corresponds to the '* lymph path " in lymphatic glands 

 (Schofield.) 



FIG 264. Reticulum of the spleen of a Cat, shown by injection with gelatin and silver nitrate 

 (Cadiat.) 



The splenic artery, after entering the spleen by its concave surface, 

 divides and subdivides, with but little anastomosis between its branches; 

 at the same time its branches are sheathed by the prolongations of the 

 fibrous coat, which they, so to speak, carry into the spleen with them. 

 The arteries send off branches into the spleen-pulp which end in capil- 

 laries, and these either communicate, as in other parts of the body, with 



