White
White Blood Cell (Leukocyte)
White blood cells (Leukocytes) are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders.
Pronunciation
- Leukocyte: loo-kuh-sahyt
- White blood cell: wahyt bluhd sel
Etymology
The term "leukocyte" directly comes from the Greek roots leuko- meaning "white" and -cyte meaning "cell".
Types of White Blood Cells
There are several different types of white blood cells, each with their own function in the immune system. These include:
- Neutrophils: These are the most common type of white blood cell. They are the first to arrive at the site of an infection.
- Lymphocytes: These cells are responsible for immune responses. There are two types of lymphocytes: B cells, which produce antibodies, and T cells, which destroy infected cells.
- Monocytes: These cells are the largest type of white blood cell. They can become macrophages and help to fight off bacteria, viruses, and other harmful pathogens.
- Eosinophils: These cells fight off parasites and also play a role in allergic reactions.
- Basophils: These cells are involved in allergic responses and inflammation.
Function
White blood cells are a key part of the body's immune system, helping to fight off diseases and infections. They do this by identifying and eliminating pathogens, which are harmful germs like bacteria and viruses.
Related Terms
- Immune system: The body's defense against infectious organisms and other invaders.
- Pathogen: A bacterium, virus, or other microorganism that can cause disease.
- Inflammation: A localized physical condition in which part of the body becomes reddened, swollen, hot, and often painful, especially as a reaction to injury or infection.
External links
- Medical encyclopedia article on White
- Wikipedia's article - White
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