Question

Layers of an ovum from outside to inside is

• A. corona radiata, zona pellucida and vitelline membrane
• B. zona pellucida, corona radiate and vitelline membrane
• C. vitelline membrane, zena uelludda and corona radiata
• D. zona pellucida, vitelline membrane and corona radiata.

Answer 1

The correct option is A corona radiata, zona pellucida and vitelline membrane

The corona radiata is the first layer of follicular (granulosa) cells outside the zona pellucida. The zona pellucida surrounds the oocyte and located between the oocyte and the follicular cells. The vitelline membrane is a membrane enclosing an egg that comprises the zona pellucida in mammals.

So, the correct answer is 'corona radiata, zona pellucida and vitelline membrane'.