White blood cells: Difference between revisions
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White Blood Cells ([[Leucocyte|leucocytes]]) are all of the [[Cell|cells]] in the blood which, unlike [[Red blood cells|Red Blood Cells]], do not contain [[Hemoglobin| | White Blood Cells ([[Leucocyte|leucocytes]]) are all of the [[Cell|cells]] in the blood which, unlike [[Red blood cells|Red Blood Cells]], do not contain [[Hemoglobin|haemoglobin]]. They make up about 1% of blood and have an average life time of 4 days.They are formed from [[Heamatopoetic|haematopoetic]] ([[Multipotent|multipotent]]) [[Stem cell|stem cells]] in the bone marrow. From there the white blood cells migrate into the tissues in response to [[Chemokine|chemokines]] to take place in the [[Immune system|immune response]] <ref>Alberts, Johnson, Lewis, Raff, Roberts and Walter (2008) Molecular Biology of The Cell, fifth edition, New York: Garland Science. 23:1451,1455</ref>. | ||
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=== Types of White Blood Cell === | === Types of White Blood Cell === | ||
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{| border="1" cellspacing="1" summary=""The three main types of blood cell are Granulocytes(neutrophils, eosinophils, basophils), Monocytes, and Lymphocytes" cellpadding="1" width="800" | {| border="1" cellspacing="1" summary=""The three main types of blood cell are Granulocytes(neutrophils, eosinophils, basophils), Monocytes, and Lymphocytes" cellpadding="1" width="800" | ||
Revision as of 16:20, 2 December 2011
White Blood Cells (leucocytes) are all of the cells in the blood which, unlike Red Blood Cells, do not contain haemoglobin. They make up about 1% of blood and have an average life time of 4 days.They are formed from haematopoetic (multipotent) stem cells in the bone marrow. From there the white blood cells migrate into the tissues in response to chemokines to take place in the immune response [1].
Types of White Blood Cell
| Cell type | % of total white blood cells | Function |
|---|---|---|
| Lymphocyte | 30 | B lymphocytes make antibodies. T lymphocytes target cells infected by viruses |
| Monocyte | 5 | Form macrophages for phagocytosis |
| Neutrophil | 60 | Phagocitosis |
| Eosinophil | 2.5 | Target parasites |
| Basophil | 2.5 | Secrete Histamine |
References
- ↑ Alberts, Johnson, Lewis, Raff, Roberts and Walter (2008) Molecular Biology of The Cell, fifth edition, New York: Garland Science. 23:1451,1455