How do the 5 senses work? Pick 1 and find out about it (consult 3 sources) and blog.

All five senses; sight, smell, taste, hear, touch, play an important role in all our lives. Without even one, people get lost in the world, for some only at first, but unfortunately for others, they feel lost for the rest of their lives. Those who get over the lost feeling, gradually learn to use their other senses for survival. The nerves in our nose, skin, tongue, eyes, and ears take in all of the different things around our environment. They bring all the different sights, smells, feelings, sounds, and tastes together and send messages to tell our brain what they are like. The brain then processes the information and lets us know what we are smelling, seeing, feeling, hearing, or tasting.

How do we smell?
Every time we breathe, air flows through the nasal cavity. The shelves of bones make the air flow down through the back of the mouth into the throat. Some air that flows into our mouths pass the olfactory organs. Odour molecules in the air will pass by and get stuck to the mucus in our nose. The sensory hairs sense the odour and transmit messages to our brain. Our brain, therefore knows the odour. The smell receptor cell is located high up behind our noses. The receptor is sensitive to chemicals in the mucus in our noses.

What disorders/diseases are associated with smell?
There are many smell diseases/disorders. One of them is Sinusitis. People of all ages can have Sinusitis. It is when there is an inflammation or infection of the air pockets on either side of and behind the nose. It is caused by viruses, fungi, and possible allergies. Another disease/disorder is phantom sensations. People of all ages also can have this. Phantom sensations are when there is presence of unpleasant or disordered tastes and smells. They can also be the presence of tastes or smells that others do not even perceive. Lastly, halitosis (also occurs to people of all ages) is when there are burning sensations in your mouth or nose. It can be a perception of bad breath.

Interesting fact:
Humans can distinguish more than 10,000 different smells (odorants), which are detected by specialized olfactory receptor neurons lining the nose.... It is thought that there are hundreds of different olfactory receptors, each encoded by a different gene and each recognizing different odorants.