The ear is the organ of hearing and balance. Sound waves enter through the auditory canal and vibrate the eardrum, which sends vibrations through the cochlea. The cochlea contains tiny hairs that convert the vibrations into electrical signals sent to the brain via the eustachian tube for processing and interpretation of sound.

1. Ear
The Organ of Hearing
and Balance
Sound waves enter the ear through
the auditory canal and then travel
through the eardrum, where they are
converted to vibrations. Millions of
tiny hairs in the inner ear’s cochlea
convert the vibrations into electrical
nerve signals, which are sent to the
brain through the eustachian tube for
processing.
1. Auditory canal
2. Eardrum
3. Cochlea
4. Eustachian tube
Rodrigo A. Ebdalin