132 NORMAL HISTOLOGY AND ORGANOGRAPHY. 



epithelium and connective- tissue fibers. Subjacent 

 to this the spleen is provided with a strong cap- 

 sule consisting of elastic fibers, connective-tissue 

 cells and involuntary muscle. The spleen is thus 

 not only distensible but may pulsate. From the 

 deep surface of the capsule processes or trabeculcz of 

 connective tissue and smooth muscle pass into the 

 substance of the spleen. From the trabeculae finer 

 branches pass to form a fine supporting fabric for 

 the whole organ. 



spken pulp - 



Fig. 96. Section of spleen. 



2 . Malpighian Corpuscles. These are lymph pock- 

 ets in the adventitia of the smaller arteries. The 

 artery rarely passes through the center of the cor- 

 puscle, but usually eccentric to or one side of it. The 

 lymph corpuscle is liberally supplied with blood. 



3. Spleen Pulp. This constitutes the bulk of the 

 spleen and fills the spaces between the trabeculae. 

 The constituent corpuscles of the blood are present 

 in this pulp and splenic cells. The latter are slightly 



