| 1. | The floor of the amniotic cavity is formed by the epiblast.
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| 2. | In general, all germ layers will derive from the epiblast.
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| 3. | These cells are also derived from epiblast which is transformed into ectoderm.
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| 4. | The epiblast layer is derived from the inner cell mass.
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| 5. | The inner cell mass initially has two layers : the hypoblast and epiblast.
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| 6. | Epiblast migrates between the epiblastic disc and trophoblast.
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| 7. | Inactivation occurs in the epiblast during gastrulation, which gives rise to the embryo.
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| 8. | The primitive streak develops from Koller s sickle and the epiblast of the avian embryo.
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| 9. | The epiblast forms the floor of the amniotic cavity and is continuous peripherally with the amnion.
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| 10. | In chicken and mouse, Vg1 and Nodal respectively promote primitive streak formation in the epiblast.
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