Examples of using Ectoderm in English and their translations into German
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The abdominal wall(ectoderm) has been formed(stage 12) Legend.
When Nodal is suppressed by its inhibitor Lefty, ectoderm forms.
The outer germ layer, the ectoderm, is controlled by the cerebral cortex.
This finds itself in the middle of the mesoderm, between the ectoderm and endoderm.
This epithelium comes from the ectoderm, endoderm and mesoderm in the fetus.
In the pharynx behind the mouth(the oesophagus) deep grooves develop that reach to the ectoderm.
Ectodermal refers to the ectoderm"the outer blastodermic layer of embryoblasts in vertebrates and humans.
Countless bacteria live in the outer cell layer, the ectoderm, of the cnidarian Hydra.
Such thickening of the ectoderm mainly results from induction processes between various types of tissue.
Different zones of the blastula fold,and form three more or less distinguishable layers: the ectoderm, endoderm and mesoderm.
These cells are derived from the ectoderm of the first pharyngeal arch and the ectomesenchyme of the neural crest.
Following a successful induction, it secretes FGF8, which affects the mesoderm that lies under the ectoderm, and there stimulates cellular division.
In the ectoderm, there is a regular maximal duration of 20 seconds, which can however be prolongated by tensing up.
Organs controlled by the new brain, i. e. new-mesoderm and ectoderm, develop hypofunction and cell depletion during the active phase.
The ectoderm forms a skin that covers the entire body and a thickened plate develops, which folds into a groove: the neural crest.
This high magnification image of the embryo shows the primary mesenchyme syncytial ring,where it attaches to the outer epithelial layer ectoderm layer.
At the navel ring cells of ectodermal origin enter under the ectoderm and form their part of this musculature.
Pluripotency is defined as the ability of a stem cell to differentiate into any cell within the three germ layers endoderm,mesoderm, and ectoderm.
Two regions exist where the ectoderm and endoderm lie directly on each other without any mesoderm cells lying between them.
In the beginning, the cells of the mesoblast(mesodermal cells) build a thin,widely meshed layer on both sides of the median line, between the ectoderm and the endoderm.
Having emigrated from the ectoderm, the primordial germ cells are now situated among the endoderm cells in the secondary yolk sac wall.
It releases itself from the nephrogenic cord and is finally localized under the ectoderm, which probably plays an inductive role in its formation 3.
Ectoderm is the designation for the outer cells of the body: therefore, the skin(epidermis), but the central nervous system also has an ectodermal origin.
The morphologic segmentation in this region is based on the differing expression of certain homebox- and other genes, their products being released from the neural tube(mesencephalon[midbrain] and rhombencephalon[hindbrain]),whereby finally interaction with the ectoderm also plays a decisive role.
Between these structures and the ectoderm there are a large number of neural crest cells(neurectodermal origin) and mesenchyma cells, which stem from the mesoderm.
One lies cranially to the prechordal plate, the other caudally to the primitivestreak During the course of the 3rd and 4th weeks, the ectoderm in these regions bonds tightly with the endoderm lying below it in order to form a bilaminar membrane that is called a pharyngeal membrane(membrana oropharyngea) cranially 10 and cloacal membrane(membrana cloacalis) 6 caudally.
This process starts when the ectoderm forms a neural plate, which is subsequently arranged to form a neural groove, and then fused to form a neural tube and crest.
In contrast to the model based on functional morphology described earlier, in the Epitheliozoa concept the ventral and dorsal cell layers of the Placozoa are homologs of endoderm and ectoderm, the two basic embryonic cell layers of the eumetazoans- the digestive gastrodermis in the Cnidaria or the gut epithelium in the bilaterally symmetrical Bilateria may have developed from endoderm, whereas ectoderm is, among other things, the precursor to the external skin layer epidermis.
The outer germ layer, called ectoderm, comprises, inter alia, all organs of sense, such as the skin, furthermore functions like insuline production ability to smell, to hear.
Consequently, these are analogous, but not homologous, to ectoderm and endoderm, the"external" and"internal" cell layers in eumetazoans; i.e. the structures corresponding functionally to one another have, according to the proposed hypothesis, no common evolutionary origin.