The
Blank
______ is a bony tube of the inner ear, which is curled like a snail's shell and filled with fluid.

Question

The 
Blank
______ is a bony tube of the inner ear, which is curled like a snail's shell and filled with fluid.

BlackTom AI · Accepted Answer

In addressing the anatomy described, we evaluate each option in turn to see which fits the clue about a bony tube of the inner ear curled like a snail's shell and filled with fluid.
Option 1: tympanic membrane. This structure, also known as the eardrum, is a thin membrane separating the outer ear from the middle ear, not a bony tube and not curled like a snail. It is not filled with fluid, but vibrates in response to sound.
Option 2: semicircular canals. These are three looped, perilymph-filled passages within the inner ear important for balance. They are not a single bony tube nor described as curled like a snail’s shell, and they contribute to equilibrium rather than the anatomy of a snail-shaped shell.
Option 3: cochlea. This is the correct choice. The cochlea is a spiraled, hollow, bony chamber in the inner ear that resembles a snail’s shell and contains fluid. Its spiraled shape and fluid-filled interior are key features for transducing sound vibrations into neural signals.
Option 4: pinna. The pinna, or auricle, is the external portion of the ear visible on the outside of the head. It is not a bony inner-ear structure, nor is it fluid-filled or snail-shaped, so it does not match the description.
Summing up, the description points directly to the cochlea due to its distinctive snail-like spiral bony tube filled with fluid, whereas the other options do not fit this combination of features.

The Blank ______ is a bony tube of the inner ear, which is curled like a snail's shell and filled with fluid.

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