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BLASTOCYST
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
The blastula of a placental mammal in which some differentiation of cells has occurred
Synonyms:
blastocyst; blastodermic vessicle
Classified under:
Hypernyms ("blastocyst" is a kind of...):
blastosphere; blastula (early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs)
Context examples:
The other two types of stem cell in the blastocyst are the extra-embryonic trophoblast stem cells (TSCs), which will form the placenta, and primitive endoderm stem cells (PESCs) that will form the yolk sac, ensuring that the foetus’s organs develop properly and providing essential nutrients.
(Scientists generate key life event in artificial mouse ‘embryo’ created from stem cells, University of Cambridge)
After the blastocyst stage of embryonic development, the inner cell mass of the blastocyst goes through gastrulation, a period when the inner cell mass becomes organized into three distinct cell layers, called germ layers.
(Germ layers, The Titi Tudorancea Bulletin)
Expressed in oocytes and blastocysts by human GNB2 Gene, 340-aa 37-kDa Guanine Nucleotide Binding Protein Beta 2 is a heterotrimeric G protein beta subunit with 7 WD repeats and involved in transmembrane signaling as a transducer that regulates G protein alpha subunits and integrates signals between receptors and effector proteins.
(Guanine Nucleotide-Binding Protein G(I)/G(S)/G(T) Subunit Beta-2, NCI Thesaurus)
At the stage of development known as the ‘blastocyst’ stage, the particular stem cells that will eventually make the future body – the embryonic stem cells (ESCs) – cluster together inside the embryo towards one end.
(Scientists generate key life event in artificial mouse ‘embryo’ created from stem cells, University of Cambridge)
