Which membrane closes the opening of vagina?

Explanation

### Step-by-Step Solution:

1. **Identify the Structure**: The question asks about a membrane that closes the opening of the vagina.

2. **Understand the Function of the Vagina**: The vagina serves as a passage for copulation and childbirth. It is an important part of the female reproductive system.

3. **Locate the Membrane**: There is a specific membrane that partially covers the vaginal opening.

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