**Core Concept**
The inner ear bony labyrinth is a complex structure responsible for maintaining balance and transmitting sound vibrations to the auditory nerve. It consists of three semicircular canals, the cochlea, and the vestibule, which work together to maintain equilibrium and facilitate hearing.

**Why the Correct Answer is Right**
The bony labyrinth is formed by the endolymphatic duct, the scala vestibuli, and the scala tympani, which are filled with endolymph and perilymph, respectively. The membranous labyrinth, a delicate structure within the bony labyrinth, contains the sensory hair cells responsible for converting sound and balance signals into electrical impulses. The bony labyrinth is enveloped by the otic capsule, a dense, compact bone that provides protection to the delicate structures within.

**Why Each Wrong Option is Incorrect**
**Option A:** This is incorrect because the inner ear bony labyrinth is not a part of the middle ear.
**Option B:** This is incorrect because the inner ear bony labyrinth is not a sensory receptor itself, but rather a structure that houses the sensory receptors.
**Option C:** This is incorrect because the inner ear bony labyrinth is not a part of the nervous system, although it does interact with the auditory and vestibular nerves.

**Clinical Pearl / High-Yield Fact**
The inner ear bony labyrinth is a critical structure that can be affected by various diseases, including otosclerosis, Meniere's disease, and labyrinthitis. Understanding the anatomy and function of the bony labyrinth is essential for diagnosing and managing these conditions.

**Correct Answer: C. Otic capsule**