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blastocyst
[ blas-tuh-sist ]
noun
, Embryology.
- the blastula of the mammalian embryo, consisting of an inner cell mass, a cavity, and an outer layer, the trophoblast.
blastocyst
/ ˈblæstəʊˌsɪst /
noun
- Also calledblastosphere the blastula of mammals: a sphere of cells ( trophoblast ) enclosing an inner mass of cells and a fluid-filled cavity ( blastocoel )
- See germinal vesicleanother name for germinal vesicle
blastocyst
/ blăs′tə-sĭst′ /
- The modified blastula that is characteristic of placental mammals. It has an outer layer, known as a trophoblast , that participates in the development of the placenta. The inner layer of cells develops into the embryo.
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Word History and Origins
Origin of blastocyst1
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