Sense of Smell
How you Smell
How do you smell?
*Cilia, the little hairs in your nose.
*Cilia, filters things that enter your nose.
*After the air passes your nose, it goes through a
thick layer of mucus, and then to the olfactory
*There the smells are recognized, each smell
molecule fits into a nerve like a key in a door.
*Then, the cells send a signal along olfactory
nerve to the brain.
*At the brain the smells are interpreted as things
say for instance fresh flowers, or moldy cheese.
This picture is demonstrating, how your
nose takes in a smell and processes it
through the olfactory bulb and it sends it
through the olfactory nerve and how you
sense it. This picture also shows you
how you detect taste.
The Olfactory Bulb
*The olfactory bulb is the most forward part
of the brain. In humans, the olfactory bulb
is on the bottom side of the brain.
*The olfactory bulb is supported and
protected by the cribriform plate of the
*The bulb is divided into two distinct
structures: the main olfactory bulb and the
accessory olfactory bulb.
*If your nose is in peak performance you can tell the
difference between 4000-10,000 smells.
*As you grow older, your sense of smell gets worse.
Children are likely to have much more subtle
senses of smell than parents or grandparents.
*Bloodhounds smell at least 1000 times better than
*Whales and Dolphins have a blowhole instead of 2
*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.
* The smell of lavender can help with insomnia and
*The Olfactory bulb controls the
sense of smell, in the frontal lower
lobe of the brain near the Broca’s
Area. Smell is the most
memorable trigger sense of the