inner cell mass

(redirected from embryoblast)
Also found in: Medical.

inner cell mass

[¦in·ər ′sel ‚mas]
(embryology)
The cells at the animal pole of a blastocyst which give rise to the embryo and certain extraembryonic membranes.
References in periodicals archive ?
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.