NCIt related terms : Reticuloendothelial system, NOS;
NCIt definition : A widely distributed collection of both free and fixed macrophages derived from bone
marrow precursor cells by way of monocytes; their substantial phagocytic activity
is mediated by immunoglobulin and the serum complement system. In both connective
and lymphoid tissue, they may occur as free and fixed macrophages; in the sinusoids
of the liver, as Kupffer cells; in the lung, as alveolar macrophages; and in the nervous
system, as microglia.;