remain in the blood only a short time before they migrate into the tissues particularly where dead tissue must be removed, where they are calledmacrophages.
One of three types of white blood cells. Monocytes are precursors to macrophages. ... (14 Nov 1997) ... 
large, agranular, mononuclear leukocytes found in the peripheral blood; responsible for phagocytosis of pathogens and damaged cells
White blood cells that clean up dead viruses, bacteria, and fungi and dispose of dead cells and debris at the end of the in