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Medical Term:

mononuclear phagocyte system


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.

Synonym(s): system of macrophages

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.