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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.
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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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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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