There are three main parts of the ear - the outer, middle, and inner ear. Sound waves enter the outer ear and cause the eardrum to vibrate, transmitting vibrations through three small bones in the middle ear. These vibrations then reach the cochlea in the inner ear, where they are converted to electrical signals that are sent by the auditory nerve to the brain, which interprets the signals and allows us to hear.

1. How can we hear?

2. There are three main parts in the ear:
the outer ear (oído externo), middle
ear (oído medio) and inner ear (oído
interno).
OUTER
EAR
INNER
EAR
MIDDLE
EAR

3. 1. Sound waves enter the
auditory canal in the outer
ear.

4. 2. Next, the eardrum vibrates, and
these vibrations go to the three
small bones in the middle ear.

5. 3. Next, the vibrations go to the cochlea
(in the inner ear). Here, the vibrations
become electrical signals.

6. 4. After that, the cochlea
sends the electrical signals to
the auditory nerve.

7. 5. Next, the auditory nerve
transmits the information to the
brain.

8. 6. Finally, the brain interprets this
information and then sends a message
to the locomotor system.