Isn't it awesome? I love learning about the brain, especially memory. Our brains form our lives completely. Every sense stems from the brain. You don't feel a cut toe in your toe, you feel it in your brain. Every thought you've ever had builds foundations for how you process new experiences into memories!
Every reaction, whether pain response, emotional, or involuntary program naturally designed is stored in the brain from the first breath we take. Memories built of experiences plus our minds learning new ways to take it in. Our appreciation for beauty or our skills or our set backs, all because of this little ol' nut in our noggins. It blows me away.
I'm pretty sure we can tell that already. Chemoreceptors? I don't remember how it's spelled. Smell receptors. Sigh. Now I need to go find out more. :)
I think I misunderstood. lol But I still found a nice little "how stuff works" entry about it: http://science.howstuffworks.com/life/human-biology/smell.htm
We live inside our heads