germ layer


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germ layer

n.
Any of three cellular layers, the ectoderm, endoderm, or mesoderm, into which most animal embryos differentiate and from which the organs and tissues of the body develop through further differentiation.

germ layer

n
(Biology) embryol any of the three layers of cells formed during gastrulation. See ectoderm, mesoderm, endoderm

germ′ lay`er


n.
any of the three primary embryonic cell layers. Compare ectoderm, endoderm, mesoderm.
[1875–80]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.germ layer - (embryology) any of the 3 layers of cells differentiated in embryos following gastrulation
embryonic tissue - tissue in an embryo
ectoblast, ectoderm, exoderm - the outer germ layer that develops into skin and nervous tissue
mesoblast, mesoderm - the middle germ layer that develops into muscle and bone and cartilage and blood and connective tissue
endoblast, endoderm, entoblast, entoderm, hypoblast - the inner germ layer that develops into the lining of the digestive and respiratory systems
embryology - the branch of biology that studies the formation and early development of living organisms
References in periodicals archive ?
The cell characterization assays kits comprise specific comprehensive media and tri-layer-based protocols for analyzing in-vitro focused distinction experiment in every germ layer, reproducibly and evidently stating trilineage differentiation.
Old and new insights into PGC development may reveal why this tumor, which is composed of one germ layer, that is, endoderm (or two if one considers embryonic and extraembryonic endoderms separately), takes on a much more traditional tumorigenic phenotype.
(b) The inhibition of FGFR1 led to an increase in the mRNA level of three germ layer marker genes.
The human brain arises from the germ layer called ectoderm that gives rise to nails, hairs, enamel of the tooth, sensory epithelium of the ear, nose and eye, skin.
We then measured mutations in three somatic tissues derived from each germ layer (ectoderm: brain; mesoderm: bone marrow; endoderm: liver) using the recoverable lacZ reporter transgene within the Muta[TM]Mouse genome (Lambert et al.
First, we confirmed the pluripotent capacity of these cells by embryoid body generation and three germ layer spontaneous differentiations.
Human cells derived from embryos before implantation, on the other hand, are also known to differentiate into each germ layer, but not consistently in the lab.
The first covers cell evolution and development, discussing the neural crest as a fourth germ layer, cellular processes and signaling involved in neural crest formation, epigenetic regulation, and tissue interactions in species-specific pattern.
However, hundreds of studies have found tremendous health benefits related to whole grain consumption--grains that are intact and possess their outer layer of bran, their starchy endosperm layer, and their inner germ layer. These documented benefits include a lower risk of stroke, type 2 diabetes, heart disease, asthma, colorectal cancer, inflammatory diseases and gum disease, increased satiety (sense of fullness) and healthier weight status.
According to Streckfuss-Bomeke et al, Germ-line Stem Cells (GSCs) are capable of self-renewal and differentiating into all germ layer derivatives.