How the ear works

How the ear works

Poll

Are your ears identical?

• YES

• NO

the ear can be divided into 3 parts

the ear has 2 jobs- 1 to help you hear & 2 to help you keep your balance

Outter

• is made of cartilage and soft tissue.

• pinna serves as a collector of sound vibrations around us and guides the vibrations into the ear canal.

• It helps us decide the direction and source of sound.

Poll

The ear is broken into how many parts?

• One

• Two

• Three

Middle

• Ear Canal: funnels the sound to the ear drum.

• Ear Drum: collects the vibrations from the air and passes it to the middle ear.

• the ear canal is where you also find ear wax

Open Ended

Why is ear wax important?

Middle

• The middle ear contains three tiny bones, called the Ossicles.

  hammer/anvil/stirrup

• They are the smallest bones in the human body, designed to transfer vibrations from the eardrum to the cochlea.

• Eustachian Tube extend from the middle ear to the back of your throat. They help remove fluid and balance pressure on your ear drum

Inner

• Cochlea is filled with fluid and hair cells. When vibrations enter, the hair picks them up, vibrate and create and electric signal.

• The cochlea changes the vibrations into electrical signals that the brain can use. If damanged can cause hearing loss

• The auditory nerve collects the electric signals and sends them to the brain. They are interpreted and assigned meaning, so you can hear a sound.

• The semicircular canals are filled with fluid and are part of our balance system. When the fluid is disturbed you feel dizzy.

Multiple Choice

What is the job of the cochela?

• Take in the sound of outisde and changes it into vibrartions

• It helps you keep your balance so you dont get dizzy

• It changes the vibrations into electrical signals that the brain can use.

Multiple Choice

Do we have hair in our ears?

• Yes

• No

Multiple Choice

How many bones are in our ears?

• One

• Two

• Three

Multiple Choice

What is the job of the ear drum?

• Ear Drum collects the vibrations from the air and passes it to the middle ear.

• Ear Drum creates electonic sound waves that travel into the ear canal

• Ear Drum makes sound