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1 lut 2012 · Zona radiata (ZR), also called vitelline envelope (VE), is named after its radial shape and located outside the cell plasmalemma. It is called zona pellucida (ZP) in mammals (Wassarman, 1987a, Wassarman, 1987b).
1 lut 2012 · In this study, we investigate the formation of zona radiata, theca cell and granulosa cell in the teleost Pseudosctaena crocea. Four layers exist outside the oocyte plasamallea, i.e., theca cell layer, basal membrane, granulosa cell layer and zona radiata. Microvilli fully participates in the formation of zona radiata and granulosa cells. Three ...
13 wrz 2018 · The zona radiata (Zr) is located between the plasma membrane of the oocyte and the follicular cells (Fig. 2H). A fibrillar network surrounds stage I and II oocytes (2 C, F).
26 mar 2020 · The term “zona radiata” is due to the structure of this protective layer, which perfectly describes the radial channels, formed by the deposition of the ZR around the microvilli. The GC and theca cells (TC) highly proliferate, constituting a regular epithelium around the oocyte.
The zona radiata (ZR) is a non- cellular envelope over oolemma of teleost fish oocytes. The morphology of the ZR varies in different ovarian developmental stages and also among various fish species, which reflects adaptation to ecological conditions.
The coronal radiata is a layer of granulosa cells (referred to as cumulus cells) surrounding the zona pellucida of a secondary oocyte (Dorland, 2011). Additionally, the corona radiata forms the innermost layer of the cumulus oophorus.
1 kwi 2005 · The ultrastructure of the zona radiata surface, the distribution density of pores and the size of eggs were also useful characters for distinguishing among the four species, but the ultrastructural features of the micropyles were the most important of all for egg identification.
