The senses: the hearing.

Ear canal, outer ear and middle ear.

Outer ear, middle ear and ear.

Outer ear, middle ear and inner ear.

The eardrum and the cochlea.

The eardrum and the three small bones (ossicles).

The ear canal, eardrum and the ossicles.

First, the sound vibrates in the eardrum and the vibration goes to the ossicles.

First, sound enters the ear and goes through the ear canal.

Secondly, the vibration goes to the ossicles and the cochlea.

Secondly, the eardrum vibrates.

Finally, the cochlea sends the information to the brain.