Thick/ follicular cells surrounding oocyte in Graafian follicle belong to

Zona pellucida

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Corona radiata

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Membrana granulosa

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None of the above

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Solution

The correct option is C Corona radiata
The Graffian follicle is a mature follicle stage in which the secondary oocyte has undergone the first meiotic division.
The cells surrounding the oocytes are of zona pellucida. It remains intact till the implantation is done.
The follicular cells that are thick and surrounds the oocyte and zona pellucida are the cells of Corona radiata layer.
So, the correct option is ' Corona radiata.'

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