Normoblast

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Image:Proerythroblast.png Image:Basophilic erythroblast.png Image:Polychromatic erythroblast.png Image:Orthochromatic erythroblast.png An erythroblast is a type of red blood cell which still retains a cell nucleus. It is the immediate precursor of a normal erythrocyte.

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" - an unusually large erythroblast that can be associated with pernicious anemia and folic acid deficiency

1 Development
2 Additional images
3 See also
4 External links

[edit] Development

There are four stages in the development of a normoblast.

Pronormoblast

Basophilic normoblast:

Polychromatic normoblast (also polychromatophilic)

Orthochromatic normoblast (also orthochromatophilic)

[edit] Additional images

Blood cell lineage

[edit] See also

[edit] External links

Dorlands/Elsevier n_10/12578105 - "normoblast"
Dorlands/Elsevier e_15/12341680 - "erythroblast"
Dictionary at eMedicine normoblast
MeSH Normoblasts
Histology at BU 01804loa - "Bone Marrow and Hemopoiesis bone marrow smear, erythroblast series with proerythroblast "
Histology at uiowa.edu

v • d • e</span> Blood - Blood plasma
Pluripotential hemopoietic stem cells \| Red blood cells (Reticulocyte, Normoblast) \| White blood cells
Lymphoid
T cells (Cytotoxic, Helper, Regulatory T cells, Natural Killer T cells) \| B cells (Plasma cells & Memory B cells) \| Natural killer cells
Myeloid
Granulocytes (Neutrophil, Eosinophil, Basophil) \| Mast cell precursors \| Monocytes (Histiocyte, Macrophages, Dendritic cells, Langerhans cells, Microglia, Kupffer cells, Osteoclasts) \| Megakaryoblast \| Megakaryocyte \| Platelets