| The reticuloendothelial system (RES), part of the immune
system, consists of the phagocytic cells located in reticular
connective tissue, primarily monocytes and macrophages. These cells accumulate in lymph nodes and the
spleen. The Kupffer cells of the
liver and tissue histiocytes are also part of the RES.
Mononuclear phagocytic system and lymphoreticular system are synonymous with RES.
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