epiblast


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ep·i·blast

(ep'i-blast),
Gives rise to the ectoderm, mesoderm, and endoderm of the embryo proper.
[epi- + G. blastos, germ]
Farlex Partner Medical Dictionary © Farlex 2012

epiblast

(ĕp′ə-blăst′)
n.
The outer layer of a blastula that gives rise to the ectoderm after gastrulation.

ep′i·blas′tic adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

ep·i·blast

(ep'i-blast)
The component of the bilaminar embryonic disc that gives rise to ectoderm and mesoderm. The mesoderm then displaces the hypoblast cells and forms the entodermal cell layer on its inner surface.
[epi- + G. blastos, germ]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Brook et al., "New cell lines from mouse epiblast share defining features with human embryonic stem cells," Nature, vol.
Pedersen, "Clonal analysis of epiblast fate during germ layer formation in the mouse embryo," Development, vol.
As noted earlier, after blastocoele formation the hypoblast forms the yolk sac and the epiblast begins to differentiate into the three major germ cell layers.
The epiblast stem cells were hailed last night as "the missing link" that could lead to cures for diseases such as cystic fibrosis.
Gastrulation begins dorsally with involution of deep blastoderm cells to form an outer epiblast and inner hypoblast.
In wheat, embryogenic callus is most readily obtained from scutellar or epiblast tissues of immature embryos or from immature spikes that are from 5 to 20 mm long (Carman, 1995).
That genus has formula F + FP (i.e., embryo mesocotyl internode negligible, epiblast present, scutellar tail absent, embryonic leaf margins overlapping), a pattern typical of Oryzeae, not unknown in Pooideae, and unrecorded within the PACC clade.
One half is made of cells that will become amniotic ectoderm, the other half consists of pluripotent epiblast cells that in nature make up the embryonic disc.
During male embryogenesis, primordial germ cells (PGCs) derived from the epiblast relocate in the genital ridges and experience differentiation into gonocytes (McLaren, 2003).
After fertilization, first cleavage was observed within 2 h, second was between 3-4 h and after 4-6 h, a shield appeared inside and two-layered structure appeared with an outer epiblast and inner hypoblast.