Mononuclear phagocyte system  From Wikipedia, the free
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to: navigation, search  The mononuclear phagocyte system (MPS)
is a part of the immune system that consists of the phagocytic
cells[1] located in reticular connective tissue. The cells are
primarily monocytes and macrophages, and they accumulate in
lymph nodes and the spleen. The Kupffer cells of the liver and
tissue histiocytes are also part of the MPS.
"Reticuloendothelial system" is an older term for the
mononuclear phagocyte system, but it is used less commonly now,
as it is understood that most endothelial cells are not
macrophages.[2]  Cell Types and Locations[edit]  The spleen is
the largest unit of the mononuclear phagocyte system. The
monocyte is formed in the bone marrow and transported by the
blood; it migrates into the tissues, where it transforms into a
histiocyte or a macrophage.  Macrophages are diffusely scattered
in the connective tissue and in liver (Kupffer cells), spleen