Membranous labyrinth is surrounded by a fluid called

Options

A. Perilymph
B. Endolymph
C. Cerebrospinal fluid
D. Viteous humor

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure**: The question refers to the membranous labyrinth, which is a part of the inner ear. The inner ear consists of two main components: the bony labyrinth and the membranous labyrinth.

2. **Identifying the Fluids**: Within the inner ear, there are two important fluids:
- **Endolymph**: This fluid is found within the membranous labyrinth.
- **Perilymph**: This fluid surrounds the membranous labyrinth and is located between the bony labyrinth and the membranous labyrinth.

3. **Determining the Correct Answer**: Since the question specifically asks for the fluid that surrounds the membranous labyrinth, we need to identify which fluid fulfills this role. Given the definitions:
- Endolymph is inside the membranous labyrinth.
- Perilymph surrounds it.

4. **Conclusion**: Therefore, the fluid that surrounds the membranous labyrinth is called **perilymph**.

**Final Answer**: The membranous labyrinth is surrounded by a fluid called **perilymph**.

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