Phagocyte

A phagocyte is a cell that ingests (and destroys) foreign matter, such as microorganisms or debris via a process known as phagocytosis, in which these cells ingest and kill offending cells by cellular digestion. These phagocytes are extremely useful as an initial immune system response to tissue damage.

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The two types of phagocytes, polymorphonuclear leukocytes and macrophages, each have an important role in the immune system. While polymorphonuclear leukocytes typically respond swiftly and efficiently to invading pathogens; they are mainly adapted for short term response. Macrophages, on the other hand, are initially slow to react, but are capable of engulfing and digesting almost any foreign agent, and last for a longer period of time.

Cell: A cell is a single unit or compartment, enclosed by a border or wall. A cell is usually part of a larger structure. More specific meanings depend on the context in which the work is used....

Microorganism: A microorganism or microbe is an organism that is so small that it is microscopic (invisible to the naked eye). Microorganisms are often illustrated using single-celled, or unicellular organisms; however, some unicellular protists are visible to the naked eye, and some multicellular species are mic...

Phagocytosis: Phagocytosis (literally, "cell eating") is a form of endocytosis where large particles are enveloped by the cell membrane of a (usually larger) cell and internalized to form a phagosome, or "food vacuole."...