Our nose is able to discriminate between different _______ in the air.
Odor molecules are tiny bits of _____ floating in the air.
Come from food, flowers, rotten garbage, or other things with smells.
Microscopic nerve cells that detect smell and send the signals onto the brain (size of postage stamp)
Many odors are not just a single ____ but a whole mixture of them.
small hair-like structures far back in the nasal cavitiy that sweep back and forth.
thin, clear ____ that dissovles odor molecules not already in vapor form.
Covered with a thin, clear mucus
must analyze over 300 different odor molecules to identify the smell of a rose