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An erythroblast is a type of red blood cell which still retains a cell nucleus. It is the immediate precursor of a normal erythrocyte.
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Nomenclature
The term normoblast is sometimes used as a synonym for erythroblast, but at other times it is considered a subcategory. In the latter context, there are two types of erythroblasts:
- "normoblasts" - develop as expected
- "megaloblasts" - unusually large erythroblasts that can be associated with pernicious anemia and folic acid deficiency (collectively called megaloblastic anemia)
Development
There are four stages in the development of a normoblast.
| Image | Description |
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Pronormoblast |
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Basophilic normoblast |
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Polychromatic normoblast (also polychromatophilic) |
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Orthochromatic normoblast (also orthochromatophilic) |
Additional images
 Blood cell lineage |
_diagram.png) Hematopoiesis |
See also
External links
- Pronormoblasts Presented by the University of Virginia
- Basophilic Normoblasts Presented by the University of Virginia
- Polychromatophilic Normoblasts Presented by the University of Virginia
- Orthochromatic Normoblasts Presented by the University of Virginia
- Normoblast at Dorland's Medical Dictionary
- Erythroblast at Dorland's Medical Dictionary
- normoblast at eMedicine Dictionary
- MeSH Normoblasts
- Histology at BU 01804loa - "Bone Marrow and Hemopoiesis bone marrow smear, erythroblast series with proerythroblast "
- Histology at uiowa.edu
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Wikipedia content modification information:
- This page was last modified on 12 October 2008, at 05:24.
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