THE SPLEEN. 



185 



ing the endothelium of the capillaries. This epithelium is composed 

 of more spindle-shaped cells than are usual in capillary vessels 



Fig. 159. 



Section from the spleen of the cat. (Bannwarth.) Termination of an arterial capillary in 



the pulp. 



and, when the vessels are distended, separate, leaving clefts between 

 them. This separation may also be effected by distention of the 



Fig. lbu. 



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4 G» 





1 



& 



Section from the spleen of the eat. (Bannwarth.) Beginning of a capillary venous radicle. 



pulp-spaces which produces tension on the reticular fibres, and this 

 opens the clefts between the endothelia of the capillaries. When the 



