Pulp (spleen)
Encyclopedia
The pulp of the spleen
Spleen
The spleen is an organ found in virtually all vertebrate animals with important roles in regard to red blood cells and the immune system. In humans, it is located in the left upper quadrant of the abdomen. It removes old red blood cells and holds a reserve of blood in case of hemorrhagic shock...

 is practically all splenic tissue from one trabecular artery to another. It consists of red pulp and white pulp.
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