Ppt gr.3 ears

3. What do you hear?
•Did you hear something? Maybe the sound
you heard was as quiet as your cat licking
her paws. Or maybe it was loud, like a
siren going by.
•Sounds are everywhere, and you have two
cool parts on your body that let you hear
them all: your ears!
•No matter where we go, sound waves are
all around us.

4. Human ear
•It has two
functions
- one is hearing
- maintaining the
balance of the
body or
equilibrium

5. Three parts the ear

6. 1. Outer ear
– collects sound waves and sends them to the middle ear. It is
the visible part of the ear.
a. PINNA OR AURICLE
- it is a flap of skin supported by the cartilage. It is a
curved a part of the ear attached to the head, its shape
makes it efficient in collecting and capturing sound waves
- the soft tissue that hangs from the lower part of the
auricle is the earlobe

7. 1. Outer ear
b. EXTERNAL AUDITORY CANAL
- serves as passageway of sound waves
into the ear. It is composed of glands which secrete
earwax. This waxy substance traps dust and other
foreign bodies to prevent them from reaching the
middle ear. The sound waves that pass through the
auditory canal go to the eardrum

8. 1. Outer ear
c. TYMPANIC MEMBRANE
( anterior eardrum)
- separates the outer ear from the
middle ear at the end of the auditory
canal that is very sensitive to sounds.

9. 2. Middle ear
- is a hollow air-filled cavity, consists of
the posterior and the three little bones:
hammer, anvil, and stirrup.it is also
situated in the middle ear the eustachian
tube

10. 2. Middle Ear
a.Tympanic membrane- causes the
eardrum to vibrate when sound come in
through auditory canal. is is the vibration
that sends sound waves deeper into the
ear.

11. 2. Middle Ear
b.The three tiniest bones of the body
a. Hammer- attached to the eardrum
b. anvil – connects the hammer to the
stirrup
c. stirrup – connected to the oval window

12. 3. Inner ear
– consists of the
cochlea and the
semicircular canals ,
located in the skull

13. 3. Inner ear
a. Cochlea – a tube shaped like a shell of a snail which
consists of coiled, liquid-filled tubes that are
separated from one another by membranes. Lining
of the membranes are specialized hair cells that are
sensitive to vibration. It contains actual organ of
hearing called organ of corti. That receives the
sound waves and transmit them to the brain

14. 3. Inner ear
b. semi-circular canal – enable the body to
maintain balance, consists of three
interconnected loop-shaped tubes at right
angles to one another, these canals contain
fluid and hairlike projections that detect
changes in body positions

15. 3. Inner ear
c. Auditory nerve –
responsible in sending
message to the brain

16. How does the ear work?
Sound Waves
Sound waves are sent.
The outer ear “catches the sound waves”.
The middle ear takes the sound waves and “vibrates”
the eardrum.
The inner ear sends the messages to the brain.
Middle Ear
Inner Ear
The brain puts it together and hooray! You hear your
favorite song on the radio.
Outer Ear

18. Common Ailments
1. EAR INFECTIONS – (middle or outer ear )
Symptoms high fever, abscess, and loss
of hearing. A milky discharge with
unpleasant odor comes out of the ear,
sever pain in the ear.

19. Common Ailments
2. EAR BOIL – an infection on the outer
ear characterized by infection and
swelling , caused by impacted teeth,
ear wax, sinusitis, or prolonged
exposure to loud noise.

20. Common Ailments
3. DEAFNESS – loss of hearing
- it is the result of an injury in the inner ear.
When the eardrum breaks , the person may
become partially or totally deaf.
OTOLARYNGONOLOGISTS – a trained doctors
who treat diseases of ear 9inflammation,
infection, or allergic condition)

21. Proper Care for the ears
1.Clean your outer ear with a clean washcloth.
2.Do not use your fingers, hairpins, or
toothpicks in removing earwax,
3.Never put any pointed object like a pencil or
ballpen into your ear.

22. Proper care for the
ears4. Do not allow anybody to shout into your ear.
Strong force of the air that may enter your ear can
press too hard on your eardrum and break it.
5. Turn down the volume of appliances.
6. Avoid blows and bumps on your head, especially
near the ear, these can injure eardrum.

23. Proper Care for the ears
7. Do not blow your nose too hard. This can cause
germs from your throat to go up the Eustachian
tube to your ears.
8. When swimming or diving , protect the eardrums
by wearing a cap or using earplugs.
9. Any ear problem should be consulted to a doctor

25. Helen Keller Story
People who have lost one or more of their
senses can succeed in life. Perhaps the most
famous case of a physically challenged
person who succeeded is that of Helen
Keller who was born normal child in 1880.

26. Helen Keller
Before she was two, an illness deprived her
of her sight and hearing. Ann Sullivan , a
special teacher , created a bond between
Helen and the world through the little
girl’s sense of touch . Helen could “hear “
Ann by placing her hand over her
teacher’s lips.

27. Helen Keller
She earned a college degree, became a
writer, and was honored by famous
people such as Alexander Graham Bell
and Eleanor Roosevelt . She toured the
world , giving hope to deaf and blind
people.