http://en.wikipedia.org/wiki/Monocyte
They play multiple roles in immune function. Such roles include: replenishing resident macrophages under normal states, and in response to inflammation signals, monocytes can move quickly (approx. 8–12 hours) to sites of infection in the tissues and divide/differentiate into macrophages and dendritic cells to elicit an immune response. Half of them are stored in the spleen (except in people who have undergone splenectomy). Monocytes are usually identified in stained smears by their large kidney shaped or notched nucleus. These change into macrophages after entering into the tissue spaces.
They play multiple roles in immune function. Such roles include: replenishing resident macrophages under normal states, and in response to inflammation signals, monocytes can move quickly (approx. 8–12 hours) to sites of infection in the tissues and divide/differentiate into macrophages and dendritic cells to elicit an immune response. Half of them are stored in the spleen (except in people who have undergone splenectomy). Monocytes are usually identified in stained smears by their large kidney shaped or notched nucleus. These change into macrophages after entering into the tissue spaces.
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