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Yolk Sac

Known as: sac yolk, Sacs, Yolk, Vitelline Sac of Embryo 
The first of four extra-embryonic membranes to form during EMBRYOGENESIS. In REPTILES and BIRDS, it arises from endoderm and mesoderm to incorporate… Expand
National Institutes of Health

Papers overview

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Highly Cited
2015
Highly Cited
2015
Most haematopoietic cells renew from adult haematopoietic stem cells (HSCs), however, macrophages in adult tissues can self… Expand
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Highly Cited
2002
Highly Cited
2002
The extent to which primitive embryonic blood progenitors contribute to definitive lymphoid-myeloid hematopoiesis in the adult… Expand
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Highly Cited
1999
Highly Cited
1999
In this study, we have mapped the onset of hematopoietic development in the mouse embryo using colony-forming progenitor assays… Expand
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Highly Cited
1999
Highly Cited
1999
Microglia, the resident CNS macrophages, represent about 10% of the adult brain cell population. Although described a long time… Expand
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Highly Cited
1996
Highly Cited
1996
TGF-beta signaling is mediated through two types of serine/threonin kinase-containing receptors, type I (TGF-betaRI) and type II… Expand
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Highly Cited
1995
Highly Cited
1995
The scl gene encodes a basic-helix-loop-helix transcription factor which was identified through its involvement in chromosomal… Expand
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Highly Cited
1995
Highly Cited
1995
THE receptor tyrosine kinase Flk-1 (ref. 1) is believed to play a pivotal role in endothelial development. Expression of the Flk… Expand
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Highly Cited
1985
Highly Cited
1985
The in vitro developmental potential of mouse blastocyst-derived embryonic stem cell lines has been investigated. From 3 to 8… Expand
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Highly Cited
1970
Highly Cited
1970
Summary. The mouse yolk sac has been shown to contain in‐vivo colony forming cells capable of producing granulocytic… Expand
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Highly Cited
1964
Highly Cited
1964
Rickettsiae in yolk sacs are not stained well by the Macchiavello technique, and experiments were undertaken to understand the… Expand
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