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inner cell mass |
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inner cell mass [¦in·ər ′sel ‚mas] (embryology) The cells at the animal pole of a blastocyst which give rise to the embryo and certain extraembryonic membranes. 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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Once a fertilized egg has gone through several rounds of division, stem cells form a bulge, called the inner cell mass, inside the early embryo. The cells in the inner cell mass grow to become a panda fetus. All cells of the early human embryo are totipotent until shortly after the blastocyst stage, including the cells of the inner cell mass and even the primitive germ-line cells. |
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