Term Name:	primitive red blood cell
Synonyms:	primitive erythroblast, primitive erythrocyte, primitive erythroid cell
Definition:	A large nucleated basophilic erythrocyte found in mammalian embryos. This cell type arises from the blood islands of yolk sacs and expresses different types of hemoglobins (beta-H1, gamma-1 and zeta) than adult erythrocytes. Considered a type of erythroblast as this cell type can enucleate in circulation.
Ontology:	Cell Ontology [CL:0002355]