When a microbe that is not part of the normal biota enters the body it is likely to first encounter host defenses in the form of white blood cells called Phagocytes.
- A specific kind of immune cell that can encircle and eliminate bacteria, consume foreign objects, and eliminate dead cells. It may also strengthen immunological reactions.
- Phagocytes include monocytes, macrophages, and neutrophils. One variety of white blood cell is the phagocyte.
- When a cell engages in phagocytosis, it uses its plasma membrane to engulf a big particle, creating the phagosome, an internal compartment. It is a specific kind of endocytosis.
- Phagocytes are cells that carry out phagocytosis. The most efficient phagocytic cells in humans and other animals are two different types of white blood cells called neutrophils and macrophages (giant phagocytic cells) (a type of granulocyte).
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