| 11. | This layer surrounds the inner cell mass and a fluid-filled cavity known as the blastocoele.
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| 12. | However, ultimately, the inner cell mass, inside the trophoblast layer, is aligned closest to the decidua.
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| 13. | These embryos were of poor quality, lacking a substantial inner cell mass and poorly constructed trophectoderm.
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| 14. | Inside the sphere is a blob known as the inner cell mass, which contains the stem cells.
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| 15. | The stem cells are part of an inner cell mass within an embryonic sphere called a blastocyst.
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| 16. | The inner cell mass, the embryoblast, begins to transform into two distinct epithelial layers just before implantation occurs.
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| 17. | As the syncytiotrophoblast starts to penetrate the uterine wall, the inner cell mass ( embryoblast ) also develops.
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| 18. | Further segregation of blastomeres into the trophoblast and inner cell mass are regulated by the homeodomain protein, Cdx2.
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| 19. | Embryonic stem ( ES ) cells are the cells of the inner cell mass of a blastocyst, an early-stage embryo.
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| 20. | That clump, the inner cell mass, ordinarily consists of stem cells that can be isolated and grown in a laboratory.
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