Corona radiata (embryology)
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Caption = Human ovum examined fresh in the liquor folliculi. The [[zona pellucida]] is seen as a thick clear girdle surrounded by the cells of the corona radiata. <BR><BR>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. |
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Caption2 = Histology of the preovulatory follicle |
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:''For the structure in [[neuroanatomy]], see [[Corona radiata]].''
The '''corona radiata''' surround an [[ovum]] or unfertilized egg cell, and consist of two or three strata (layers) of follicular cells. They are attached to the outer protective layer of the [[ovum]], the [[zona pellucida]], and their main purpose in many animals is to supply vital proteins to the cell. They appear at [[ovulation]], but may disappear eventually after [[fertilization]].
==External links==
* [http://mcb.berkeley.edu/courses/mcb135e/fertppt/HTML/sld010.htm Image at Berkeley]
* {{BUHistology|18404loa}}
{{developmental-biology-stub}}
{{Female reproductive system}}
[[pl:Wieniec promienisty]]
[[pt:Coroa radiada]]
[[fi:Korona radiata]]