What are the auditory ossicles?

What are the auditory ossicles?

• A. The bones that seal off the inner ear.
• B. The muscles controlling ear movement.
• C. The smallest bones in the body that amplify sound vibrations.
• D. The membranes separating middle ear.

Answer: (C)

Auditory ossicles are the three tiny bones in the middle ear—the malleus, incus, and stapes—that transmit and amplify vibrations from the eardrum to the inner ear. They form a lever system to boost the sound energy as it moves into the fluid-filled cochlea, helping overcome the impedance difference between air and inner-ear fluids. They’re among the smallest bones in the body, which is why they’re described as amplifying sound vibrations. They aren’t muscles, nor membranes, and they don’t seal the inner ear.

Auditory ossicles are the three tiny bones in the middle ear—the malleus, incus, and stapes—that transmit and amplify vibrations from the eardrum to the inner ear. They form a lever system to boost the sound energy as it moves into the fluid-filled cochlea, helping overcome the impedance difference between air and inner-ear fluids. They’re among the smallest bones in the body, which is why they’re described as amplifying sound vibrations. They aren’t muscles, nor membranes, and they don’t seal the inner ear.