embryoblast


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em·bry·o·blast

(em'brē-ō-blast'),
The mass of cells at the embryonic pole of the blastocyst that forms the embryo and some extraembryonic or adnexal tissues.
Synonym(s): inner cell mass
[embryo- + G. blastos, germ]

em·bry·o·blast

(em'brē-ō-blast)
The cells at the embryonic pole of the blastocyst concerned with formation of the embryo per se.
Synonym(s): inner cell mass.
[embryo- + G. blastos, germ]
References in periodicals archive ?
(2) Developmentally; they are formed exactly like monozygotic twins, except that the inner cell mass (embryoblast) does not completely split.
For example, ESC are derived from cells that are removed from the inner cell mass of the blastocyst (or embryoblast); iPSC are a reprogrammed adult cell (from any tissue cell back to pluripotent stem cells) [21, 22]; and the adult SC are found in adult tissues within specific anatomical locations and niches.
To the contrary, "more than the zygote's chromosomal genetic information" is involved, "namely, the genetic material from maternal mitochrondia, and the maternal or paternal genetic messages in the form of messenger RNA or proteins."(18) This extra-zygotic genetic information is necessary to the differentiation of cell function (also called "restriction") within the zygote, forming placenta, membranes, and embryoblast, and eventually producing particular organs in which all but the very few relevant genetic instructions are "turned off."