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White blood cells (also called leukocytes or leucocytes) are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All white blood cells are produced and derived from multipotent cells in the bone marrow known as hematopoietic stem cells. Leukocytes are found throughout the body, including the blood and lymphatic system.
Types of White Blood Cells[edit | edit source]
There are five main types of white blood cells, which can be divided into two main categories: granulocytes and agranulocytes.
- Granulocytes: These cells contain granules in their cytoplasm and include neutrophils, eosinophils, and basophils.
- Agranulocytes: These cells do not contain granules in their cytoplasm and include lymphocytes and monocytes.
Function of White Blood Cells[edit | edit source]
The primary function of white blood cells is to fight infection. They do this by attacking and destroying the organisms that cause disease. White blood cells also play a role in the immune response, inflammation, and allergic reactions.
White Blood Cell Count[edit | edit source]
A white blood cell count is a test that measures the number of white blood cells in your body. This test is often included with a complete blood count (CBC). The normal number of WBCs in the blood is 4,500 to 11,000 WBCs per microliter (4.5 to 11.0 x 109/L).
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References[edit | edit source]
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