2. We use our senses and our nervous system
to interact with the world.
sight
taste
hearing
smell
touch
We have five senses
3. We use our senses and our nervous system
to interact with the world.
Each of these senses sends
a message through the
nervous system to our brain
sight
taste
hearing So we know what is
smell
happening around us touch
and can respond.
We have five senses
4. Our eyes are the
organs of sight.
Match
We can see different shapes, sizes and colours.
5. Our eyes are
very delicate
and are protected
by our…
eyebrows,
eyelashes
and eyelids.
These stop sweat and dust getting into our eyes.
6. The iris is a big coloured circle at the front of
the eye. The pupil is a black circle in the
middle of the iris.
7. Light enters the eye through the pupil
and it makes an image on the retina at
the back of the eye. The retina sends
this information to our brain and this is
what we see.
retina
pupil
8. Our ears are the
organs of hearing.
Match
We can hear sounds that are loud and
sounds that are quiet.
9. Our ears have three parts:
1.The outer ear is the part of our ear that is visible.
2. In the middle ear there are three small bones and
the eardrum.
3. The cochlea is in the inner ear.
Three small bones
eardrum
cochlea
10. Sounds enter the outer ear and go into the
middle ear. The eardrum vibrates. These
vibrations travel along the three small
bones to the cochlea. In the cochlea, the
vibrations are turned into signal. Nerves
carry signals to our brain, and this is what
we hear.
Look at this video.
11. Our nose is the organ of smell.
We can identify
good and bad smells.
12. Air enters the nose
through two holes
called the nostrils.
This air goes to the
olfactory nerve. The
olfactory nerve
detects smells in the
air and sends this
information to our
brain. This is what we
smell.
14. Our tongue is covered
in many taste buds.
These taste buds
identify different
tastes. Nerves send
the information about
the different tastes
to brain.
We can identify four
different tastes:
15. Our skin is the organ of touch.
We can feel things that are
hot or cold,
soft or hard
and rough or smooth
16. The skin on our fingertips
is very sensitive.
Nerves send the information from
the skin to our brain.
Our body is covered in skin.
17. The nervous system
The nervous system controls
everything we do: thinking,
walking, talking, sleeping,
eating and even breathing!
The most important part of
the nervous system is our
brain. The brain is an organ
inside our head.
It sends and receives
information to different
parts of our body through
the nerves. We have nerves
all over our body.
