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The corona radiata is the innermost layer of the cells of the cumulus oophorus and is directly adjacent to the zona pellucida, the inner protective glycoprotein layer of the ovum. Cumulus oophorus are the cells surrounding corona radiata, and are the cells between corona radiata and follicular antrum. Its main purpose in many animals is to supply vital proteins to the cell. It is formed by follicle cells adhering to the oocyte before it leaves the ovarian follicle, and originates from the squamous granulosa cells present at the primordial stage of follicular development. The corona radiata is formed when the granulosa cells enlarge and become cuboidal, which occurs during the transition from the primordial to primary stage. These cuboidal granulosa cells, also known as the granulosa radiat

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  • The corona radiata is the innermost layer of the cells of the cumulus oophorus and is directly adjacent to the zona pellucida, the inner protective glycoprotein layer of the ovum. Cumulus oophorus are the cells surrounding corona radiata, and are the cells between corona radiata and follicular antrum. Its main purpose in many animals is to supply vital proteins to the cell. It is formed by follicle cells adhering to the oocyte before it leaves the ovarian follicle, and originates from the squamous granulosa cells present at the primordial stage of follicular development. The corona radiata is formed when the granulosa cells enlarge and become cuboidal, which occurs during the transition from the primordial to primary stage. These cuboidal granulosa cells, also known as the granulosa radiata, form more layers throughout the maturation process, and remain attached to the zona pellucida after the ovulation of the Graafian follicle. For fertilization to occur, sperm cells rely on hyaluronidase (an enzyme found in the acrosome of spermatozoa) to disperse the corona radiata from the zona pellucida of the secondary (ovulated) oocyte, thus permitting entry into the perivitelline space and allowing contact between the sperm cell and the nucleus of the oocyte. (en)
  • La corona radiata (del latín radiante o con rayos) es la estructura de células pequeñas que rodea a un ovocito secundario y posteriormente al óvulo. Consiste de varias capas de células del folículo ovárico que están unidas a la capa protectora más externa del óvulo. (es)
  • La corona radiata est l'ensemble des cellules folliculaires issues de la granulosa et qui entourent l'ovocyte I et II. Ces cellules spécialisées directement au contact de l'ovocyte sont le plus visible au stade du follicule pré-ovulatoire, ou follicule de De Graaf, et font partie du cumulus proliger (massif de cellules de la granulosa qui le rattache à la périphérie). * Portail de la médecine * Portail de la biologie cellulaire et moléculaire (fr)
  • Nella fisiologia femminile la corona radiale (o radiata) è un insieme di cellule che ricoprono la zona pellucida. (it)
  • De corona radiata omgeeft een eicel en bestaat uit twee of drie cellagen van granulosacellen. Ze zitten vast aan de zona pellucida en hun belangrijkste taak is de eicel te voorzien van voedingsstoffen. Ze worden gevormd bij de ovulatie, maar kunnen eventueel verdwijnen na de bevruchting. (nl)
  • A coroa radiada ou corona radiata cerca o óvulo e consiste em duas ou três camadas de células foliculares. Estão ligadas à camada protectora exterior do óvulo, a zona pelúcida. A sua principal função em muitos animais é a de fornecer proteínas vitais à célula. Aparece durante a ovocitação, mas pode desaparecer após a fertilização. (pt)
  • Corona radiata omger en obefruktad äggcell, och består av två tre lager med , det vill säga celler som kommer från äggblåsan i äggstockarna. De är fästa i det yttre skyddande lagret runt ägget, som heter zona pellucida, och deras huvudsakliga uppgift hos många djur är att vara näringslager till ägget. De försvinner efter att ägget har blivit . Corona radiatas andra viktiga uppgift, som är det första den gör, är att skydda den när den passerar genom äggblåsans vägg vid själva ägglossningen. För att befruktning skall kunna ske måste sperman ta sig genom corona radiata, vilket den gör genom att utsöndra enzymet . Det behövs enzym från dussintals sperma för att göra lagret så försvagat att en sperma kan tränga in till äggcellen.[källa behövs] (sv)
  • Wieniec promienisty (łac. corona radiata) – komórki folikularne otaczające oocyt w stadium pęcherzyka Graafa. Powstają w czasie tworzenia się jamy pęcherzyka jako subpopulacja komórek warstwy ziarnistej. (pl)
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  • Histology of the preovulatory follicle (en)
  • Human ovum examined fresh in the follicular fluid. The zona pellucida is seen as a thick clear girdle surrounded by the cells of the corona radiata. (en)
  • The egg itself shows a central granular deutoplasmic area and a peripheral clear layer, and encloses the germinal vesicle, in which is seen the germinal spot. (en)
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  • Corona radiata (en)
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  • La corona radiata (del latín radiante o con rayos) es la estructura de células pequeñas que rodea a un ovocito secundario y posteriormente al óvulo. Consiste de varias capas de células del folículo ovárico que están unidas a la capa protectora más externa del óvulo. (es)
  • La corona radiata est l'ensemble des cellules folliculaires issues de la granulosa et qui entourent l'ovocyte I et II. Ces cellules spécialisées directement au contact de l'ovocyte sont le plus visible au stade du follicule pré-ovulatoire, ou follicule de De Graaf, et font partie du cumulus proliger (massif de cellules de la granulosa qui le rattache à la périphérie). * Portail de la médecine * Portail de la biologie cellulaire et moléculaire (fr)
  • Nella fisiologia femminile la corona radiale (o radiata) è un insieme di cellule che ricoprono la zona pellucida. (it)
  • De corona radiata omgeeft een eicel en bestaat uit twee of drie cellagen van granulosacellen. Ze zitten vast aan de zona pellucida en hun belangrijkste taak is de eicel te voorzien van voedingsstoffen. Ze worden gevormd bij de ovulatie, maar kunnen eventueel verdwijnen na de bevruchting. (nl)
  • A coroa radiada ou corona radiata cerca o óvulo e consiste em duas ou três camadas de células foliculares. Estão ligadas à camada protectora exterior do óvulo, a zona pelúcida. A sua principal função em muitos animais é a de fornecer proteínas vitais à célula. Aparece durante a ovocitação, mas pode desaparecer após a fertilização. (pt)
  • Wieniec promienisty (łac. corona radiata) – komórki folikularne otaczające oocyt w stadium pęcherzyka Graafa. Powstają w czasie tworzenia się jamy pęcherzyka jako subpopulacja komórek warstwy ziarnistej. (pl)
  • The corona radiata is the innermost layer of the cells of the cumulus oophorus and is directly adjacent to the zona pellucida, the inner protective glycoprotein layer of the ovum. Cumulus oophorus are the cells surrounding corona radiata, and are the cells between corona radiata and follicular antrum. Its main purpose in many animals is to supply vital proteins to the cell. It is formed by follicle cells adhering to the oocyte before it leaves the ovarian follicle, and originates from the squamous granulosa cells present at the primordial stage of follicular development. The corona radiata is formed when the granulosa cells enlarge and become cuboidal, which occurs during the transition from the primordial to primary stage. These cuboidal granulosa cells, also known as the granulosa radiat (en)
  • Corona radiata omger en obefruktad äggcell, och består av två tre lager med , det vill säga celler som kommer från äggblåsan i äggstockarna. De är fästa i det yttre skyddande lagret runt ägget, som heter zona pellucida, och deras huvudsakliga uppgift hos många djur är att vara näringslager till ägget. De försvinner efter att ägget har blivit . Corona radiatas andra viktiga uppgift, som är det första den gör, är att skydda den när den passerar genom äggblåsans vägg vid själva ägglossningen. (sv)
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  • Corona radiata (embryology) (en)
  • Corona radiata (embriología) (es)
  • Corona radiata (fr)
  • Corona radiale (it)
  • Corona radiata (nl)
  • Coroa radiada (pt)
  • Wieniec promienisty (pl)
  • Corona radiata (embryologi) (sv)
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  • Corona radiata (en)
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