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macrophage
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Labeled illustration of a macrophage showing its internal organelles and the process of engulfing and digesting bacteria, with bacteria drawn outside and inside the cell as it undergoes phagocytosis. Macrophage attacking a cancer cell Immune stimulation by activated helper T cells
Observe the human immune response phagocytosis
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Videos

Observe the human immune response phagocytosis
Learn about the human immune response phagocytosis by watching time-lapse photography...
Video: Encyclopædia Britannica, Inc.

Images

Macrophage structure
The principal phagocytic (cell-engulfing) components of the immune system are known...
Encyclopædia Britannica, Inc.
Macrophage attacking a cancer cell
Scanning electron micrograph of a macrophage (purple) attacking a cancer cell (yellow).
Microworks/Phototake
Immune stimulation by activated helper T cells
Stimulation of immune response by activated helper T cells. Activated by complex...
Encyclopædia Britannica, Inc.
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