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extraembryonic

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extraembryonic /ex·tra·em·bry·on·ic/ (eks″trah-em″bre-on´ik) external to the embryo proper, as the extraembryonic coelom or extraembryonic membranes.
ex·tra·em·bry·on·ic (kstr-mbr-nk)
adj.
Located outside of the embryonic body.
extraembryonic [ek″strah-em″bre-on´ik]
external to the embryo proper, as the extraembryonic coelom or the extraembryonic membranes.
extraembryonic
external to the embryo proper, as the extraembryonic celom or the extraembryonic membranes.
extraembryonic membranes
the fetal membranes, chorion, amnion, allantois, yolk sac; term used mostly in the early embryonic period.
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The jelly resists twisting and compression, thus serving to protect the critical vascular lifeline, the formation of the umbilical cord begins when the connecting stalk of the extraembryonic mesoderm links the embryo to the trophoblast.
Mammalian development, umbilical cord and placenta of albino mice by Frederick, Robyn; Rischbieter, Michael / Bulletin of the South Carolina Academy of Science
Five embryonic stem (ES) cells and seven extraembryonic (trophoblast) stem cell lines were produced from single mouse blastomeres, which maintained normal karyotype (chromosome type) and markers of pluripotency or TS cells for up to more than 50 passages.
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