Tuesday, September 20, 2016

Our Sense of Smell

Here are some interesting facts about our sense of smell. 

1. People can detect at least one trillion distinct scents. The nose can smell at least one trillion distinct scents. 

2. Scent cells are renewed every 30 to 60 days. The sense of smell is the only cranial nerve — nerves that emerge from the brain and control bodily functions including eye movement, hearing, taste, and vision  that can regenerate.

3. You can smell fear and disgust. You can smell feelings of fear and disgust through sweat, and then you can experience the same emotions.

4. Smell is the oldest sense. Chemodetection — detecting chemicals related to smell or taste — is the most ancient sense.

5. Women have a better sense of smell than men. Women always are better at odor and smell identification than men. Women have a more developed orbital prefrontal region of the brain. It may have also evolved from an ability to discern the best possible mates, or to help women better bond with and understand newborns.

6. Age-related loss of smell is linked to race. African-Americans and Hispanics experience loss of smelling related to age earlier than Caucasians.

7. Each human has their own distinct odor. Like fingerprints, every person has their own distinct odor. The distinct odor you have comes from the same genes that determine tissue type.

Here´s the video we watched to review how our nose works:

How Our Body Works

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