EMBRYONIC DEVELOPMENT & STEM CELL COMPENDIUM
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Extraembryonic Mesoderm
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Extraembryonic Blood Islands
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Primitive Erythrocytes (ExBI)


ExM.ExBI.pRBCs

Primitive erythrocytes are cells that contain embryonic hemoglobin and mobilize oxygen in the body. These cells are large nucleated cells and only populate the blood during the first 6 weeks of gestation.


Primitive erythrocytes enter circulation at E8.5 in the mouse.  In humans, they are detectable from day 18.5 of gestation.

E7.5 - E9
Red Blood Cell, RBC
Blood
Primitive Erythrocytes
Multiple Ancestors Single Ancestor No Descendants Develops from Part of Parent
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