Secondary egg membrane of human is formed by:-

Options

A. Mucopolysaccaride
B. Granulosa cells
C. mucaus cell
D. Thecal cell

Answer

To determine the formation of the secondary egg membrane in humans, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Egg Structure**:
- The human egg (oocyte) has multiple layers surrounding it. The primary egg membrane is the first layer, which is formed by follicular cells.

2. **Identifying the Secondary Egg Membrane**:
- The secondary egg membrane is also known as the zona pellucida. This is the layer that surrounds the oocyte and is crucial for fertilization.

3. **Components of the Secondary Egg Membrane**:
- The secondary egg membrane (zona pellucida) is primarily formed by the secretion of the theca cells.

4. **Types of Theca Cells**:
- The theca cells are divided into two types:
- **Theca Externa**: This is the outer layer that acts like a fibroblast layer providing structural support.
- **Theca Interna**: This layer functions as an endocrine layer, producing hormones.

5. **Evaluating the Options**:
- Now, let's evaluate the provided options:
- **Option 1: Mucopolysaccharide** - This is incorrect as it does not specifically refer to the formation of the secondary egg membrane.
- **Option 2: Granulosa Cell** - This is also incorrect as granulosa cells contribute to the primary membrane but not the secondary.
- **Option 3: Mucous Cell** - This option is irrelevant in this context.
- **Option 4: Theca Cell** - This is the correct answer as the secondary egg membrane is formed by the theca cells.

6. **Conclusion**:
- Therefore, the secondary egg membrane of humans is formed by the **theca cells**.

### Final Answer:
The secondary egg membrane of humans is formed by the **theca cells**.

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