EMBRYONIC DEVELOPMENT & STEM CELL COMPENDIUM
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Extraembryonic Mesoderm
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Extraembryonic Blood Islands
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Primitive Hematopoietic Stem Cells (ExBI)


ExM.ExBI.pHSCs

Primitive hematopoietic stem cells are progenitors for the primitive hematopoietic cells of the Yolk Sac that serve as the source for primitive erythrocytes, megakarocytes and macrophages. These progenitors are committed to a single lineage and appear first in development.

E7.5 - E9
HSC
Primitive Hematopoietic Stem Cells
Multiple Ancestors Single Ancestor No Descendants Develops from Part of Parent