endoderm


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to endoderm: mesoderm

endoderm

 [en´do-derm]
the innermost of the three primary germ layers of the embryo; from it are derived the epithelium of the pharynx, respiratory tract (except the nose), digestive tract, bladder, and urethra. Called also endoblast, entoderm, entoblast, and hypoblast.

en·do·derm

(en'dō-dĕrm),
The innermost of the three primary germ layers of the embryo (ectoderm, mesoderm, endoderm); from it is derived the epithelial lining of the primordial gut and the epithelial component of the glands and other structures (for example, lower respiratory system) that develop as outgrowths from the gut.
Synonym(s): entoderm
[endo- + G. derma, skin]

endoderm

(ĕn′də-dûrm′) also

entoderm

(ĕn′tə-)
n.
The innermost of the three primary germ layers of an animal embryo, developing into the gastrointestinal tract, the lungs, and associated structures. Also called hypoblast.

en′do·der′mal adj.

en·do·derm

(en'dō-dĕrm)
The innermost of the three primary germ layers of the embryo (ectoderm, mesoderm, endoderm); from it are derived the epithelial lining of the primordial gut and the epithelial component of the glands and other structures (e.g., lower respiratory system) that develop as outgrowths from the gut tube.
Synonym(s): entoderm, hypoblast.
[endo- + G. derma, skin]

endoderm

The innermost of the three primary germ layers of an EMBRYO. The endoderm develops into the INTESTINAL TRACT and its associated structures and glands, the respiratory and urinary tracts and most of the endocrine glands. See also MESODERM and ECTODERM.

endoderm

or

endoblast

the embryological germ layer in animals that gives rise to the gut system and its association organs. It arises initially as a result of GASTRULATION from cells which have moved in from the surface of the BLASTULA. Compare ECTODERM and MESODERM.
References in periodicals archive ?
They focused on one part of endoderm internalization: the hindgut, which gives rise to half of the small intestine, the large intestine, and colon.
The initial phase of craniofacial morphogenesis is characterized by the formation of the BAs, which arise during pharyngeal development when the lateral wall of the pharynx becomes invaginated, forming the structures known as the branchial pouches; in the outer embryo, the pharyngeal endoderm becomes depressed, forming the fissures known as the branchial clefts (2).
After specification of the PGCs in the early mesendoderm ~2 weeks after conception, they make their way to the wall of the yolk sac endoderm [45].
Differentiation of RUES2 cells to an intestinal lineage resulted in an efficiency of approximately 60% for both endoderm and mid/hindgut differentiations (Figures 3(a) and 3(b), Table S2).
Mulato II, Llanero and Estrela-roxa presented a higher thickening of the walls of the endoderm (Figure 1g), with an increase of intercellular spaces in the cortex of Mulato II.
The pharyngeal gut is separated from the primitive oral cavity by the buccopharyngeal membrane, whereas the foregut extends to the cloacal membrane that is the boundary between endoderm and ectoderm (1-9).
(See figure) In placing the embryo outline over the iris chart, we see the areas of the ectoderm, the mesoderm, and the endoderm relate to the location of the various organs and body structures.
Plates were harvested for analyses at the following time points: Day 2: Stem Cell, after 2 days' culturing in Stem Cell media; Day 5: Endo Diff, after 3 days' exposure in definitive endoderm induction media; Day 10: Hep Spec, after 5 days' induction in hepatic specification media; Day 15: Early Hep Mat, after 5 days' induction in hepatocyte maturation media; and finally Day 20: Late Hep Mat, after 10 days' induction in hepatocyte maturation media.
The mouse embryo epiblast organizes initially from a ball of cells and becomes an epithelial layer in the form of a cup (cup-shaped) surrounded by visceral endoderm (equivalent to the humans' hypoblast).
Background: The Definitive Endoderm (DE) differentiation using the undefined media and non-human feeders can cause contaminations in the generated cells for therapeutic applications.
Only cells of the inner cell mass (ICM) from blastocyst have the pluripotent capacity for formation of all three primary germ layers, endoderm, mesoderm, and ectoderm.
The first step of pancreatic development is primitive endoderm (PrE) specification from pluripotent stem cells isolated from the mural surface of the inner cell mass of blastocysts (3-5 days post-fertilization in mice).