We can close our - PowerPoint Presentation

Slide1

We

can

close

our

eyes

,

but

not

our

ears

.Slide2

1. Structure

of your ear.

https://www.youtube.com/watch?v=T8lKKlnnC6M a) Watch the video and make notes of all parts of your ear which you hear mentioned in it.Slide3

https://www.youtube.com/watch?v=WOgI5lAR_bQ

b

)

Now listen to the following video on the same topic. It will help you with the other parts of ear:Slide4

auditory

canal

auricle

, pinnaeardrummalleusincusstapes

tympanic

cavity

Eustachian

tube

round

window

cochlea

auditory nerve

semicircular

canalsSlide5

Differences in terminology

maleus

= hammer

incus = anvilstapes = stirrupauditory canal = ear canaleardrum = tympanic membraneEustachian tube = auditory tubeSlide6

c) Listen again and answer the questions:

1. What other

fu

nctions apart from hearing does the ear system have?2. What are the three parts of the outer ear?3. Which two things does the Eustachian tube connect?4. Which two parts make up the inner ear?5. What does cochlea do?6. What are the two functions of the eardrum?7. Why is the auditory (Eustachian) tube important?8. Why are children suffering from ear infections more often than adults?Slide7

1)

difference

between up/down, balance organ,

orientation, complex movements2) auricle, auditory canal, outer part of the eardrum3) middle ear with nose/throat area4) vestibule (balance) + cochlea (filled

with

fluid)

5)

converts

sound

waves

to nerve

signals

6) transmits soundwaves,

prevents dirt and germs from

entering the middle

ear7) releases the fluid

produced

by

middle

ear

,

lets

in

the

air to

regulate

the

pressure

8)

their

auditory tube

is

shorter

,

which

means

higher

risk

of

infectionSlide8

d)

Describe

how the

ear works in your own words. Use the picture to illustrate what you are saying.Slide9

2. How

old are your ears

?Do the test and listen to the explanation.https://www.youtube.com/watch?v=VxcbppCX6Rk Slide10

3. Do you

know how other

people hear your voice? Try this simple test.https://www.youtube.com/watch?v=zHosAyfhSpA Slide11

4.

How

good is human

hearing compared to animals?Slide12

Here

are

some interesting facts

about animal hearing.First, make sure that you know what the words marked in bold mean.In pairs try to match

the

facts

with

the

animals

. Compare with

another pair. Then check with

the teacher.Slide13

dolphins

bats

cats

dogs

rabbits

sheep

elephants

owls

fish

chicken

They hear mainly with their

lower jaw bones

.

They use

echolocation

, a system of sound waves from their mouth or nose, to detect insects.

They have a system of

liquid-filled canals

that gives them an excellent balance.

They are able to hear a difference between the footsteps of different people.

Their ears are able of wide rotation to tell them from where the sound is coming, they can hear a sound from the distance of 3 kilometres.

They are very frightened by

high-pitched sounds

, such as dogs

barking

.

They use

infrasound

to communicate over long distances, such as 1.5 km.

They have ears at different positions on their head, they are turning the head until the sound is coming identically to both ears – then they know they are looking in the direction where the

prey

is.

They don´t have ears, they hear by

decoding

the vibrations caught by the so called

lateral line

.

They can

regrow

hair cells in their ears and repair their hearing (humans cannot do this).

SolutionSlide14

Sources

:

https://www.anatomylibrary99.com/10-human-ear-anatomy/label-

the-ear-anatomy-diagram/; 28. 8. 2017http://www.philtulga.com/MSSActivities.html; 25. 8. 2017http://www.ageukhearingaids.co.uk/hearing-aid-news/how-does-animals-hearing-compare-humans-infographic; 25. 8. 2017