The document summarizes the three main parts of the human ear: the outer, middle, and inner ear. The outer ear collects sounds and directs them through the ear canal to the middle ear. The middle ear contains the eardrum and three tiny bones called ossicles that vibrate sounds waves into the inner ear. The inner ear contains the cochlea, which is filled with fluid and detects sound vibrations, and the semicircular canals which help with balance by detecting head movements. The document also provides tips for ear care such as wearing earplugs in loud environments and avoiding putting objects in the ear canal.

1. Lesson for Grade 1-3

2. Our ears have 3 main parts:
•__ __ __ __ __ ear
•__ __ __ __ __ __ ear
•__ __ __ __ __ ear

4. The Outer Ear
1. __ __ ___ ___ ___ or auricle.
• This is the part of the ear that people can see.
• The main job of the outer ear is to collect
sounds, whether they're your friend's
whispers or a barking dog.

5. The Outer Ear
2. Ear canal or auditory canal
It is where the wax is being
produced.

6. The Outer Ear
Earwax contains chemicals that
fight off infections that could
hurt the skin inside the ear
canal.
It also collects dirt to help keep
the ear canal clean

7. Middle Ear
The middle ear's main job is to take
those sound waves and turn them into
vibrations that are delivered to the
inner ear.

8. Middle Ear
1. Eardrum
It is a thin piece of skin stretched tight
like a drum.
The role of the ear drum is to carry
sound waves to the middle through
vibrations.

9. eardrum

10. The eardrum separates the outer
ear from the middle ear and the
ossicles (say: ah-sih-kulz)

11. 2. ossicles
They are the three tiniest,
most delicate bones in your
body.

12. 1. Hammer
2. Anvil
3. Stirrup- the smallest bone in
the body

13. When sound waves reach the
eardrum, they cause the eardrum to
vibrate. When the eardrum vibrates,
it moves the tiny ossicles — from
the hammer to the anvil and then to
the stirrup.

14. The Inner Ear: Nerve Signals Start
Here
1. Cochlea
It’s a small, curled tube in the
inner ear. The cochlea is filled
with liquid, which is set into
motion, like a wave, when the
ossicles vibrate.

15. Inner Ear
2. Semicircular canals
These are three tiny,
fluid-filled tubes in your
inner ear above your
cochlea that help you
keep your balance. When
you move your head, the
fluid in the canal touches
the tiny hairs.

16. Inner Ear
2. Semicircular canals
These hairs translate the movement of
the liquid into nerve messages that are
sent to your brain. Your brain then can
tell your body how to stay balanced.

17. How to Take Care of your Ears
1. Protect your hearing by wearing earplugs
at loud music concerts and around noisy
machinery, like in wood or metal shop at school.
Keep the volume down on your stereo,
especially if you're in the car or wearing
headphones.
2. Don't go poking around in your ears, even
with cotton swabs.
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