160 



THE ESSENTIALS OF HISTOLOGY 



organ is composed of a close network or spongework of flattened and 

 branched cells like connective-tissue corpuscles. Coursing through the 

 pulp and communicating with its interstices are capillary blood-vessels 



FIG. 193. VERTICAL SECTION OF A SMALL SUPERFICIAL PORTION OF THE HUMAN 

 SPLEEN, AS SEEN WITH A LOW POWER. 



A, peritoneal and fibrous covering ; 6, trabeculrc ; c, c, Malpighian corpuscles, in one of which 

 an artery is seen cut transversely, in the other longitudinally ; d, injected arterial twigs ; 

 e, spleen-pulp. 



FIG. 194. TmN SECTION OF SPLEEN-PULP, HIGHLY MAGNIFIED, SHOWING THE 



MODE OF ORIGIN OF A SMALL VEIN IN THE INTERSTICES OF THE PULP. 



v, the vein, filled with blood-corpuscles, which are in continuity with others, bl, filling up the 

 interstices of the retiform tissue of the pulp ; , wall of the vein. The shaded bodies 

 amongst the red blood-corpuscles are pale corpuscles. 



which are connected with the terminations of the arteries ; whilst in 

 other parts venous channels arise from the pulp, and bring the blood 

 which has passed into its interstices from the arterial capillaries 



