mononuclear phagocyte system
Definition
Noun: A mononuclear phagocyte system is a widely distributed system of free and fixed macrophages derived from bone marrow. It is a part of the immune system responsible for phagocytosis (engulfing and destroying pathogens and debris) and antigen presentation.
Usage
The term is used in medical and biological contexts to describe a specific cellular network within the immune system. * The liver's Kupffer cells are a key component of the mononuclear phagocyte system. * Researchers are studying how the mononuclear phagocyte system responds to chronic infections.
Advanced Usage
- The term is sometimes abbreviated as MPS in technical literature.
- The study focused on MPS activity in the spleen.
- Historically, this system was referred to as the reticuloendothelial system (RES), though mononuclear phagocyte system is now the more precise and preferred term in modern immunology.
Variants and Related Words
- Macrophage (n): A type of white blood cell within the mononuclear phagocyte system that engulfs and digests cellular debris and pathogens.
- Phagocytosis (n): The process by which a cell engulfs a solid particle, the primary function of the mononuclear phagocyte system.
- Reticuloendothelial System (RES) (n): An older, broader term largely superseded by "mononuclear phagocyte system."
Synonyms
- Macrophage System: A less formal synonym emphasizing the primary cell type involved.
- Phagocytic System: A functional synonym highlighting the system's main activity.
Related Phrases
- Fixed macrophage: A macrophage that is stationary within tissues (e.g., in the liver, spleen, lymph nodes), as opposed to free-moving monocytes in the blood.
- Free macrophage: A macrophage, such as a monocyte, that circulates in the blood or moves through tissues.
Noun
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a widely distributed system of free and fixed macrophages derived from bone marrow
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