Identify two small apertures present in auditory capsule

Options

A. Foramen magnum and foramen ovale
B. Foramen ovale and fossa ovalis
C. Fenestra ovalis and obturator foramen
D. Fenestra ovalis and fenestra rotunda.

Answer

To identify the two small apertures present in the auditory capsule, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Context**: The question asks for two small apertures located in the auditory capsule, which is part of the ear anatomy.

2. **Identify the Relevant Structures**: The auditory capsule, also known as the otic capsule, contains important openings that play a role in hearing.

3. **Recall the Names of the Apertures**: The two small apertures in the auditory capsule are known as:
- **Oval Window** (also referred to as Fenestra Ovalis)
- **Round Window** (also referred to as Fenestra Rotunda)

4. **Describe Their Functions**:
- **Oval Window**: This is the membrane-covered opening that connects the middle ear to the inner ear. It is involved in transmitting sound vibrations from the stapes (a bone in the middle ear) to the fluid in the cochlea.
- **Round Window**: This is another membrane-covered opening that serves as a pressure release valve for the fluid in the cochlea. It allows for the movement of fluid, which is essential for the proper functioning of hearing.

5. **Confirm the Correct Answer**: Based on the definitions and functions, the correct apertures are:
- Fenestra Ovalis (Oval Window)
- Fenestra Rotunda (Round Window)

### Final Answer:
The two small apertures present in the auditory capsule are **Fenestra Ovalis (Oval Window)** and **Fenestra Rotunda (Round Window)**.

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