Reissner's membrane is present between

Options

A. scala vestibuli and scala media
B. scala media and scala tympani
C. scala tympani and scala vestibuli
D. membranous labyrinth and ear ossicles.

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of the Ear:**
- The ear is divided into three main parts: the outer ear, the middle ear, and the inner ear. The inner ear contains structures crucial for hearing and balance.

2. **Identifying the Inner Ear Components:**
- The inner ear consists of the bony labyrinth and the membranous labyrinth. The cochlea, which is essential for hearing, is part of the membranous labyrinth.

3. **Recognizing the Fluids in the Cochlea:**
- The cochlea contains two types of fluids: perilymph and endolymph. Perilymph is found in the scala vestibuli and scala tympani, while endolymph is found in the scala media.

4. **Locating Reissner's Membrane:**
- Reissner's membrane, also known as the vestibular membrane, separates the scala vestibuli from the scala media. It plays a crucial role in maintaining the ionic composition of the endolymph and perilymph.

5. **Conclusion:**
- Therefore, Reissner's membrane is present between the scala vestibuli and the scala media.

**Final Answer:**
Reissner's membrane is present between the scala vestibuli and scala media.

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