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hy′po·blas′tic adj.


1. (Zoology) embryol Also called: endoblast the inner layer of an embryo at an early stage of development that becomes the endoderm at gastrulation
2. (Zoology) a less common name for endoderm
ˌhypoˈblastic adj


(ˈhaɪ pəˌblæst)

1. the endoderm of an embryo.
2. the cells entering into the inner layer of a young gastrula, capable of becoming endoderm and, to some extent, mesoderm.
hy`po•blas′tic, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hypoblast - the inner germ layer that develops into the lining of the digestive and respiratory systems
germ layer - (embryology) any of the 3 layers of cells differentiated in embryos following gastrulation
References in periodicals archive ?
The human embryo, in the gastrulation stage, has the shape of a flat disc with two layers of cells (bilaminar disk) known as epiblast and hypoblast (Figure 1) [40].
Antin, "Induction of cardiac myogenesis in avian pregastrula epiblast: the role of the hypoblast and activin," Development, vol.
This gland is only a part of the lymphoid tissue derived from the hypoblast. Developmentally, tonsils arise from the ventral portion of the second pharyngeal pouch, i.e.
The first is the ICM, which subsequently develops into the epiblast and hypoblast; the epiblast forms the fetus.