Question

Innermost layer of Graafian follicle is

• A. Membrana granulosa
• B. Corona radiata
• C. Discus proligerus
• D. None of the above

Answer 1

The correct option is B Corona radiata

The corona radiata is considered as the innermost layer of the graffian follicle and is directly adjacent to the zona pellucida, the outer protective layer of the ovum. 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.

Thus, the correct answer is the option (B).