Transcript How Do We Experience Daily Living Throughout Our Senses?

How Do We Experience Daily Living
Throughout Our Senses?
Lucia, Robert, Sharif, Isabella, Laurette and Juliette
A Day At the Beach
You feel the warm sand beneath your toes. As the tide
comes in and out, the water cools you off. There are
kids running around and building sand castles. There
are birds flying over the water. While eating vanilla ice
cream, you hear the crashing of the waves, and you
smell the salty air.
What senses are you using?
Sight- The Eye
The human eye allows vision. Rod and
cone cells allow light perception and vision
including the difference between colors.
The retina controls the size of the pupil.
The human eye can distinguish about 10
million different colors.
Sight- The Eye
Your eyes
are the most
complex
organs you
posses
except for
your brain.
The cornea
focuses the
light into a
sharp image
on the back
of the eye.
It also covers
the iris, pupil,
and the anterior
chamber. The
iris is a thin,
circular
structure in the
eye. The retina
is a tissue at
the back of the
eye that’s
sensitive to light
energy.
Taste- The Tongue
The organs of taste are the taste buds.
Taste buds are found on the roof of your
mouth and the side of your mouth. We
have ten thousand taste buds.
Taste- The Tongue
There are five different types of taste:
• Salty- french fries and chips
• Sweet- cotton candy and
strawberries
• Sour- shock tarts and
lemons
• Bitter- black licorice and
radishes
• Umami- specific taste in
meat
Smell – The Nose
Everything you smell gives off
molecules, they float through the air
and into your nose. Humans smell with
their brains. The nose is how we take
in the air but when the air reaches the
olfactory bulb located in the front of
the brain,
this is where the odors are
identified. Your nose lets
you smell and it is a big
part of why you are able to
taste things.
Smell-The Nose
The Olfactory Receptive neurons
can detect several molecules and
pass the information to the brain
by using the olfactory neurons.
Smells are detected by special
olfactory receptors which are
encoded by a different gene.
Esters are organic
molecules that
evaporate from fruit or
flowers.
Smell – The Nose
People who cannot smell have a condition
called Ansomia. Your smell print is determined
by the number of genes, the
environment, diet, medicines, your
emotional state, your skin type and
weather.
Sound-the ear
• Outer ear transmits vibration to the inner
ear.
• Inner ear has a snail shaped like thing
called the cochlea covered in nerve fibers
• It reacts to the vibration in the auditory
nerves
• Humans can hear frequencies from 16
cycles per second
Sound-the ear
• When an object moves it sends sound waves
• These waves are then passed into your ear
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canal by the outer ear
The vibrations will go to your middle ear then hit
the eardrum
This will set off a chain reaction of vibrations
Humans can generate sound between 20 hours
to 20 kilo hours
That’s 20 and 20,000 cycles per second
Touch-The Skin
While the other four senses are
located in a single area of your
body, touch is found all over.
Your body has about twenty
different touch receptors but for
the most part, they specialize in
experiencing hot, cold, pain, or
pressure.
Touch is based on nerve receptors
in the skin that send electrical
messages through the CNS to the
brain, where feelings are
registered.
Touch is very important for
survival, but it is also a way of
introducing yourself and or
showing respect, friendship, love,
concern, encouragement,
congratulations, or appreciation.
You have more pain receptors
than any other receptor in your
body, which proves how vital
touch is to life. When put in
dangerous or scary situations,
people take action to protect
themselves from pain.
Since touch develops in embryos before all other senses, it is the main way in
which infants gain information about their environment and form close
relationships with their parents. Loving and warm touch (such as cuddling a
baby) enhances their:
• Learning
• Language
processing
• Problem solving
• Physical recovery
speeds
• Growth
• Emotional stability
Fun Facts
• You have more pain nerve endings than any other type
• Rattlesnakes use their skin to feel the body heat of other
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animals
All babies are colorblind when they are born
Your eyes are composed of more than 2 million working parts
Insects have the best sense of taste
Fish can taste with their fins, tails, and mouth
Some people can’t smell skunks, while others can’t smell
freesias
Astronauts in space tend to lose their sense of smell and
taste (Because of the lack of gravity, their sinuses fill up with
fluid, causing stuffiness similar to a cold)
Animals hear more sounds than humans
Children have more sensitive ears than adults
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Resources
www.librarythinkquest.org/3750/touch/touch.html
www.faqs.org/health/topics/3/touch.html
www.serendip.brynmawr.edu/exchange/node/4356
www.thesenseofsmell.org
www.librarythinkquest.org/3750/smell/smell.html
www.senseofsmellinstitute.com
www.wisegeek.com
www.discoverhealth.com
www.kidshealth.org
www.thesoslab.com
www.thinkquest.com
www.newworldencyclopedia.com
www.wisconline.com
www.pamt.org
www.funfactz.com
www.converyoptometrists.com/facts.aspx
www.en.wikipedia.org/wiki/human_eye
www.en.wikipedia.org/wiki/cornea
Natural History Museum