Embryonic
71embryonic induction — The induction of differentiation in one tissue as a result of proximity to another tissue arising, for example, during gastrulation. One of the best known examples is the induction of the neural tube in the ectoderm by the underlying chordo… …
72embryonic stem cell — (= ES cell) Totipotent cell cultured from early embryo. Have the advantage that following modification in vitrothey can be used to produce chimeric embryos and thus transgenic animals …
73embryonic membrane. — See extraembryonic membrane. [1945 50] * * * …
74embryonic area — see under disc …
75embryonic axis — an imaginary line from the head end to the tail end of an embryo or, before that, the line of elongation of the primitive streak and groove …
76embryonic blastoderm — the region of the blastoderm forming the embryo proper …
77embryonic stem cells — totipotent stem cells derived from the embryoblast or inner cell mass of the blastocyst …
78embryonic determination — the loss of pluripotency in any part of an embryo and its start on the way toward an unalterable fate …
79embryonic line — the primitive streak in the center of the germinal area …
80embryonic phase — see under period …