nose has receptors that are sensitive to chemicals. When
your nose senses chemical stimuli it sends a message to
the brain. A lot of animals depend on their sense of smell
for survival. Dogs and cats are far more developed in this
area than humans. Even humans, however, have a strong sense
of smell. Our sense of smell can save our lives, like when
a fire has started, the smell of smoke can alert us to danger.
Many environmental factors can impair our sense of smell,
like those that influence our sight. And because some objects
have similar smells or none at all we can often be misled
into thinking they're something that they're not.
Household "Smelly" Challenge:
some dishes and place some smelly objects on them.
Here are a few examples:
everyone put blindfolds on and see how well your sense of
smell works. Notice if you put the garlic and the onion
beside each other it's very difficult to tell them apart.
Also, the more strong odors your nose smells, the greater
confusion results as you move from one to another - possibly
from overwork and the lingering smell of previous objects.