epiblast

American  

[ep-uh-blast] / ˈɛp əˌblæst /

noun

Embryology.

1. the primordial outer layer of a young embryo before the segregation of the germ layers, capable of becoming the ectoderm and containing cells capable of becoming the mesoderm and endoderm.

---

epiblast British  

/ ˈɛpɪˌblæst /

noun

1. Also called: ectoblast.  embryol the outermost layer of an embryo, which becomes the ectoderm at gastrulation

---

Other Word Forms

• epiblastic
  adjective

Etymology

Origin of epiblast

First recorded in 1865–70; epi- + -blast

Example Sentences

See Examples For:

epiblast

To this end, they developed a novel embryo-like model system consisting of a layer of epiblast and a layer of VE cells -- a cup without a lid.

From Science Daily ● Jun. 18, 2024

At this point, the head develops from the inner cell layer of the cup, the epiblast, and the tail develops on the opposite side.

From Science Daily ● Jun. 18, 2024

Transcriptomics analysis revealed that, in POU5F1-null cells, gene expression was downregulated not only for extra-embryonic trophectoderm genes, such as CDX2, but also for regulators of the pluripotent epiblast, including NANOG.

From Nature ● Sep. 19, 2017

Control cells clustered according to lineage and are indicated with the coloured bars: red, primitive endoderm; green, epiblast; and blue, trophectoderm.

From Nature ● Sep. 19, 2017

Proctodaeum: the invagination of epiblast that produces the anus and intestine as far forward as and including malpighian tubes.

From Explanation of Terms Used in Entomology by John. B. Smith