Sentences with phrase «ectoderm of»

Pituitary dwarfism is usually associated with a failure of the oropharyngeal ectoderm of the cranial pharyngeal duct (Rathke's pouch) to differentiate into trophic - hormone - secreting cells of the pars distalis.

The second most common cause is craniopharyngioma, a benign tumor derived from the oropharyngeal ectoderm of Rathke's pouch.

The cells originate outside the central nervous system in the ectoderm of the body wall and appear to migrate to their final locations within the central nervous system by crawling along strands of connective tissue.

Not exact matches

It's in the last of these «derms» — the ectoderm — where the vast majority of skin, hair and nails develop.

But it seemed unlikely, because the body coverings were thought to grow differently: Feathers and hair develop from specialized plates of thickened ectoderm — an embryonic cell layer — called anatomical placodes, structures not seen in reptiles.

These «snapshots» of development led scientists to believe that gills were formed from different tissues: the internal «endoderm» lining in jawless vertebrates, and the «ectoderm» outer skin in the jawed.

The pluripotent cells of the embryo organize themselves at an early stage in germ layers: the endoderm, mesoderm and ectoderm.

ES cells are pluripotent, that is, they are able to differentiate into all derivatives of the three primary germ layers: ectoderm, endoderm, and mesoderm.

YFP expressing cells are also observed in the surface ectoderm and left half of the forebrain (G).

But we do know that, like other animals, the human embryo in its earliest stages consists of three main components known as germ layers: the ectoderm, the endoderm and the mesoderm.

Noggin strongly induces the expression of the EFTFs in frog primitive ectoderm and human ES cells [3], [7].

Therefore, successful removal of part or the entire eye field would spare the host presumptive lens ectoderm in the majority of the animals.

In one of the experiments, for example, activation of a particular signal at the correct time elicits the appearance of the mesoderm, endoderm and ectoderm — the precursors of all cell types — with a spatial organization similar to that of an embryo.

bilaterians: A clade of animals whode members share: bilateral symmetry, are triploblastic (three tissue layers: ectoderm, mesoderm, endoderm), and with HOX genes in one or more clusters with the genes within a cluster arranged in the same order as the body parts they affect.

Simultaneously, expression of markers for major developmental lineages, including trophectoderm (Cdx2), ectoderm (Fgf5), mesoderm (T) and endoderm (Gsc, Sox7 and Afp), was activated (Figure 4B, bottom panel).

Histochemical analysis indicated the existence of tissues from all three germ layers, such as neural epithelial cells (ectoderm), intestines (endoderm) and muscle (mesoderm)(Figure 6A).

The presence of rosette - like structures (A, yellow arrow) and ectoderm - derived squamous epithelium was identified (B, yellow arrow).

J, Hematoxylin and eosin staining of teratoma sections generated from integration - free iPSC lines showing differentiation in three germ layers: goblet cells in gastro - intestinal (GI) tract (endoderm); neural rosettes (ectoderm) and blood vessels, muscle and cartilage / bone (mesoderm).

Moreover, ES cell differentiation in vitro recapitulates events that take place during early embryonic development including the formation of the three germ layers of ectoderm, mesoderm and endoderm, and the emergence of endothelial, hematopoietic, cardiac, neuronal and hepatic or pancreatic cells [8], [9].

«There is another concern about «embryoids,» which are a special class of organoid containing all three layers of embryonic tissue: the ectoderm, mesoderm, and endoderm,» says Koehler.

The tongue is a muscle composed of all three embryonic germ layers — endoderm, ectoderm and mesoderm.

Among other things, when the embryon grows into a fetus, the ectoderm gives rise to the central and the peripheral nervous system, the mesoderm gives rise to connective tissue, the kidneys and the bones and muscles, and the entoderm gives rise to the epithelial lining of the gastrointestinal and respiratory tracts, the liver and the pancreas.

Ectodermal defects: any of a multitude of abnormalities arising from maldevelopment of the fetal ectoderm (e.g., skin, nervous system, eyes).

This name refers to the fact that the early embryo of bilaterians (the blastula stage) is generally composed of three primary germ layers: the ectoderm (outer layer), the endoderm (inner layer), and the mesoderm (middle layer) between them.