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Transcript of 5 senses
we are able to relate to what is around us through our senses.
This means that we can recognise and respond to changes.
How do we relate to what is around us?
allows us to move
receives information from the senses and chooses the best response.
I am cold
What does our nervous system do?
controls everything that happens in our bodies. It is made up of:
is inside the skull. It is the organ that receives and responds to information about what is happening inside and outside our body.
all over our body.
They can carry messages to and from the brain and the rest of the body.
How does our nervous system work?
We have five senses:
We carry the messages from and to the brain
are the organs of
. We use our eyes to identify
. The eyes has different parts
is the coloured
circle in the middle of the eye.
is the black hole in the middle of the iris
We see an object because light bounces off it.
The light goes into the eye through the pupil. The lens focuses the light and makes an image of the object on the retina. This is like the screen at the back of the eye. The retina is connected to the optic nerve and this carries the message to the brain. If there is no light, we cannot see!
are organs of
We use our ears to hear the sounds. The ear has three parts
outer ear canal
: has small hairs and wax. They stop dust from going in.
Three little bones:
A sound goes into the ear, down the outer ear canal and makes the ear drum vibrate.
The vibrations go to the small bones of the middle ear. These pass the vibrations on the cochlea in the inner ear. The cochlea is connected to the auditory nerve.
The auditory nerve carries the message to the brain.
The smell goes into the nose through the nostrils .
Inside the nostrils there are small hairs and mucus to stop dust from going in.
The smell is picked up bu nerve endings connected to the olfactory nerve which carries the message to the brain.
is the organ of
We use our noses to identify different smells.
The organ of
. The tongue is inside the mouth. We use our tongue to identify different flavours.
All over the tongue are taste buds. These are nerve endings. They pick up different flavours. The four basic flavours are: Sweet, sour, salty and bitter.
The taste buds are connected to the taste nerves. They carry messages to the brain.
is the organ of
. We use our skin to identify if something is hot or cold, soft or hard, smooth or rough.
Our body is covered in skin. Every part of our skin has nerve endings that pick up information. These nerves carry messages to the brain.
In some parts of our skin we have more nerve endings. These are the most sensitive parts, like the palms of our hands or the soles of our feet.
THE BODY SYSTEMS
THE CIRCULATORY SYSTEM
Our body is a very complex machine. It has a lot of parts that works together. The most important parts are called
and they form the different