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extraembryonic

   Also found in: Dictionary/thesaurus 0.59 sec.
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
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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Smad5 knockout mice die at mid-gestation due to multiple embryonic and extraembryonic defects.
He also has found that the yolk sac has contractile musculature, and the embryonic heart pumps blood through an extraembryonic circulatory system not seen in other cephalopods.
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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