Question

State the three ear ossicles and their function. In which part of our ear are they located?

Answer 1

Hint: The three ear ossicles are the three small bones present in our ear. These bones help in transmission of vibrations to the internal ear. These bones are the smallest bone present in our body.

Complete answer:
To solve this question, we must know about the structure of ear ossicles and their location.
The ear is an important sense organ for hearing. It consist of three parts-
1.Outer ear comprises of external pinna, auditory canal and tympanum
2.Middle ear comprises three bones called the ear ossicles- Malleus, incus and stapes. The bones are named according to their shape like hammer, anvil and stirrup.

Malleus is attached to the tympanum and the incus. It helps in transmission of vibration from tympanum to incus.
Incus is connected to malleus and stapes.
Stapes connect the incus with the vestibule of the inner ear. It is the smallest bone in our body.
The three bones collectively help in transmission of sound vibrations from the tympanum to the membrane of the oval window. These bones change the vibration so as to improve the transfer and reception of sound.

3.Inner ear comprises fluid and receptors for transmission of impulses to the brain.

Note: The three bones are joined by the synovial joints. Sometimes these joints become rigid and the stapes get fused with the membrane of the oval window. This reduces hearing. It can be treated surgically.