Embryonic Structure
blastocyst
blas·to·cyst [ blas-tuh-sist ]
Subclass of:
Embryo, Mammalian
Definitions related to blastocyst:
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A post-MORULA preimplantation mammalian embryo that develops from a 32-cell stage into a fluid-filled hollow ball of over a hundred cells. A blastocyst has two distinctive tissues. The outer layer of trophoblasts gives rise to extra-embryonic tissues. The inner cell mass gives rise to the embryonic disc and eventual embryo proper.NLM Medical Subject HeadingsU.S. National Library of Medicine, 2021
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An embryo made up of two groups of cells. One group will develop into the fetus and the other will become the placenta.NCI ThesaurusU.S. National Cancer Institute, 2021
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Developmental organism which has as its parts trophoblast, embryoblast and blastocystic cavity.Foundational Model of AnatomyUniversity of Washington, 2017
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Blastocyst, a distinctive stage of a mammalian embryo. It is a form of blastula that develops from a berrylike cluster of cells, the morula. A cavity appears in the morula between the cells of the inner cell mass and the enveloping layer. This cavity becomes filled with fluid. The blastocyst...Encyclopedia Britannica, Inc., 2020
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