Polymorphonuclear
Polymorphonuclear (pɒliːmɔːfəʊnjuːˈklɪər)
The term Polymorphonuclear refers to a type of white blood cell that has a nucleus divided into multiple parts. These cells are a crucial part of the immune system and play a significant role in the body's defense against bacterial infections.
Etymology
The term "Polymorphonuclear" is derived from the Greek words "poly" meaning many, "morpho" meaning shape, and "nuclear" referring to a nucleus. Thus, it describes a cell with a nucleus that has many shapes or parts.
Types of Polymorphonuclear Cells
There are three main types of polymorphonuclear cells, each with a unique role in the immune system:
- Neutrophils: These are the most common type of polymorphonuclear cell. They are the first to arrive at the site of an infection and work by engulfing and destroying bacteria.
- Eosinophils: These cells are involved in the body's response to allergies and parasitic infections.
- Basophils: These are the least common type of polymorphonuclear cell. They release chemicals that help control the body's immune response.
Related Terms
- Leukocytes: This is the general term for white blood cells, which includes polymorphonuclear cells.
- Granulocytes: This is another term for polymorphonuclear cells, named for the granules that are visible in their cytoplasm.
- Phagocytosis: This is the process by which cells like neutrophils engulf and destroy bacteria.
See Also
External links
- Medical encyclopedia article on Polymorphonuclear
- Wikipedia's article - Polymorphonuclear
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