Which is innermost layer of a graafian follicle?

Options

A. Zona pellucida
B. Granulosa layer
C. Corona
D. Allantois

Answer

To determine the innermost layer of a Graafian follicle, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Graafian Follicle Structure**:
- A Graafian follicle is a mature ovarian follicle that contains an oocyte (egg) and several layers surrounding it.

2. **Identifying the Layers**:
- The Graafian follicle consists of three main layers surrounding the oocyte:
- **Oocyte**: This is the egg cell itself.
- **Zona Pellucida**: This is a glycoprotein layer that surrounds the oocyte.
- **Corona Radiata**: This is a layer of follicular cells that surrounds the zona pellucida.

3. **Determining the Innermost Layer**:
- Among the three layers, the innermost layer is the one that is closest to the oocyte.
- The order from innermost to outermost is:
- **Corona Radiata** (innermost)
- **Zona Pellucida** (middle)
- **Oocyte** (outermost)

4. **Conclusion**:
- Therefore, the innermost layer of a Graafian follicle is the **Corona Radiata**.

### Final Answer:
The innermost layer of a Graafian follicle is the **Corona Radiata**.

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