Vertaling en analyse van woorden door kunstmatige intelligentie
Op deze pagina kunt u een gedetailleerde analyse krijgen van een woord of zin, geproduceerd met behulp van de beste kunstmatige intelligentietechnologie tot nu toe:
- hoe het woord wordt gebruikt
- gebruiksfrequentie
- het wordt vaker gebruikt in mondelinge of schriftelijke toespraken
- opties voor woordvertaling
- Gebruiksvoorbeelden (meerdere zinnen met vertaling)
- etymologie
zona dei negozi - vertaling naar Engels
![First stages of segmentation of a mammalian [[ovum]]](https://commons.wikimedia.org/wiki/Special:FilePath/Gray9.png?width=200 "First stages of segmentation of a mammalian [[ovum]]")
![The initial stages of [[human embryogenesis]]](https://commons.wikimedia.org/wiki/Special:FilePath/HumanEmbryogenesis.svg?width=200 "The initial stages of [[human embryogenesis]]")
.jpg?width=200 "In \"Creation of Adam,\" Michelangelo provides a great example of the substantive view of the image of God through the mirroring of the human and the divine.")
Definitie
Wikipedia
The zona pellucida (plural zonae pellucidae, also egg coat or pellucid zone) is a specialized extracellular matrix that surrounds the plasma membrane of mammalian oocytes. It is a vital constitutive part of the oocyte. The zona pellucida first appears in unilaminar primary oocytes. It is secreted by both the oocyte and the ovarian follicles. The zona pellucida is surrounded by the corona radiata. The corona is composed of cells that care for the egg when it is emitted from the ovary.
This structure binds spermatozoa, and is required to initiate the acrosome reaction. In the mouse (the best characterised mammalian system), the zona glycoprotein, ZP3, is responsible for sperm binding, adhering to proteins on the sperm plasma membrane. ZP3 is then involved in the induction of the acrosome reaction, whereby a spermatozoon releases the contents of the acrosomal vesicle. The exact characterisation of what occurs in other species has become more complicated as further zona proteins have been identified.
In humans, five days after the fertilization, the blastocyst performs zona hatching; the zona pellucida degenerates and decomposes, to be replaced by the underlying layer of trophoblastic cells. The zona pellucida is essential for oocyte growth and fertilization.
