## bony_labyrinth_dissected.jpg

The image is a detailed anatomical illustration of the right bony labyrinth (otic capsule) removed from the membranous labyrinth in the inner ear. The illustration is labeled with various parts and their corresponding names.

### External View:
- **Posterior**: This part is located at the back of the structure.
- **Lateral**: Positioned on the side, this area faces outward.
- **Anterior**: Situated at the front or forward part of the structure.

### Internal Structure (Semicircular Canals):
- **Elliptical recess**: A rounded section that appears to be a cavity within the labyrinth.
- **Cochlear recess**: Another rounded section, likely related to the cochlea.
- **Spherical recess**: A spherical-shaped area, possibly another part of the inner ear structure.

### Membranous Labyrinth:
The membranous labyrinth is not shown in this illustration but would be located within the bony labyrinth. It includes structures such as the semicircular ducts and the cochlear duct (scala tympani), which are not visible here since they have been removed to show the bony labyrinth.

### Bony Labyrinth:
- **Vestibule**: A central part of the labyrinth with perforations for nerve fibers.
  - **Helicotrema**: A small opening in the vestibule, marked by a label pointing to it. This is where the scala tympani and scala vestibuli meet.
  - **Osseous spiral lamina**: A bony structure that forms part of the partition between the scala tympani and scala vestibuli.

- **Scala vestibuli**: The upper part of the cochlear duct, which connects to the helicotrema. It is labeled with a pointing line indicating its position.
  - **Hamulus of spiral lamina**: A small projection from the osseous spiral lamina that points into the scala tympani.

- **Scala tympani**: The lower part of the cochlear duct, which connects to the helicotrema. It is also labeled with a pointing line indicating its position.
  - **Round (cochlear) window**: A small opening in the wall between the scala vestibuli and scala tympani.

- **Internal opening of vestibular aqueduct (for endolymphatic duct)**: This is an opening that connects to another part of the inner ear, not shown here but labeled for reference. It allows fluid exchange with other parts of the ear.

### Additional Features:
- **Round (cochlear) window**: A small circular structure located at the base of the scala tympani.
- **Internal opening of vestibular aqueduct**: This is a narrow passage that connects to another part of the inner ear, not shown here but labeled for reference. It allows fluid exchange with other parts of the ear.

The illustration provides a clear view of the bony labyrinth's structure and its various components, which are crucial for understanding the anatomy of the inner ear involved in hearing and balance.

This description was generated automatically from image files by a local LLM, and thus, may not be fully accurate. Please feel free to ask questions if you have further questions about the nature of the image or its meaning within the presentation.