SCIENCE 3 THE EARS

1. THE EARS

2. EARS
•It has two functions:
a. Is used for hearing (either pleasant or
unpleasant sounds)
b. Maintaining the balance of the body or
equilibrium

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

4. THE
OUTER
EAR
A L L S O U N D S T H AT Y O U R E A R S R E C E I V E
T R AV E L T H R O U G H S E C T I O N S A S I N V I S I B L E
WAV E S .

5. PINNA OR AURICLE (EARFLAP)
• 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.

6. EAR CANAL
• It is where the wax is
being produced.
(cerumen/earwax)
• Cerumen lubricates and
protects the ear from dirt
and bacteria.

7. EARDRUM OR TYMPANIC MEMBRANE
• At the end of ear canal
• Separates the outer and
middle ear

8. THE
MIDDLE
EART I N Y C AV I T Y F I L L E D W I T H A I R .
C O N TA I N S 3 B O N E S : H A M M E R , A N V I L , A N D
S T I R R U P.
A L S O R E D U C E S T H E I N T E N S I T Y O F L O U D S O U N D S
A N D E Q U A L I Z E S T H E P R E S S U R E O N B OT H S I D E S
O F T H E E A R .

9. OSSICLES
• They are the three tiniest,
most delicate bones in
your body
• It vibrates ones the sound
wave strikes the eardrum
sending the sound to the
inner ear.

10. THE
INNER
EAR

11. 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.
• Hearing part of the inner ear
• Vestibule (inside the cochlea) –
detects the movement of the head
• Auditory nerve – sends the
messages (nerve signals from
sound waves) to the brain.
• Brain interprets the sounds and
causes us to hear it.
• Messages from the auditory
nerves combined with messages
from the eyes and muscles, if not
match it resulted as if everything
is spinning.

12. SEMICIRCULAR CANAL
• 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.

13. EUSTACHIAN TUBE
• Connects to the tympanic cavity to the throat
• Blockage of the tube may cause pain to your ear or,
inworse loss of hearing

15. COMMON
EAR
PROBLEMS
C O M M O N A M O N G C H I L D R E N , A N D A L S O
C A U S E D BY I N F E C T I O N S

16. SWIMMER’S EAR
• Infection on the auditory canal
• Causes those children who often goes to swimming
• Caused by bacteria that invades the earflap and the ear
canal
• It makes the ear tender to touch
• May also be itchy or have a discharge
• Treated by applying antibacterial eardrop prescribed by
doctor.

17. EAR CANAL BOIL
• A painful lamp or swelling with pus that develops in the
ear canal
• Caused by bacteria
• There will be itchiness and a discharge with pain
• Ear boil healed without treatment, but sometimes
doctor’s prescribe a medicine for pain reliever (an
antibiotic will do also to remove the infection)

18. Swimmer’s ear Ear canal boil

19. PROPER CARE
1. Cleaning the ear in a right way. Use clean cotton buds.
Never used pointed objects to clean them (can damage the
eardrum). Best time to clean the ears is after bathing
(cerumen is still soft).
2. Lower the volume of the radio or music player when
listening to music. Loud music can damage the eardrum
(leads to loss of hearing).
3. Consult a doctor when an insect or small objects gets into
the ear.