contributes to morphology of composed primarily of lymphocyte Homo sapiens white pulp of spleen http://upload.wikimedia.org/wikipedia/commons/1/15/Gray1191.png The white pulp contains T cells, B cells and accessory cells. The function of the white pulp is to mount an immunological response to antigens within the blood. The white pulp is present in the form of a periarteriolar lymphoid sheath. This sheath contains B cell follicles and T cells. At the edge of the T zone is a region known as the marginal zone where larger lymphocytes and antigen presenting dendritic cells are located. [Wikipedia:White_pulp] FMA:62805 UMLS:C0229686 white pulp The parenchymatous tissue of the spleen that surrounds splenic blood vessels, consists of compact masses of lymphatic cells and is where foreign material removed from the blood is used to initiate an immune reaction that results in the production of antibodies. UBERON:0001959 pulpa alba EMAPA:35809 NCIT:C12993 CALOHA:TS-1264 noduli lymphoidei splenici Wikipedia:White_pulp MA:0000762 splenic white pulp spleen white pulp spleen spleen pulp