Originally posted by renorenal:
[b]CHAMPION MYSTERIOUS
QUESTION
I have 3 other friends
They stay quite close to me
We make everything lighter
We produce lots and lots of mucus;
Whenever we are faced with difficulties
We are often paired
Some divide us front and back
Some divide us from top to bottom
But suffice to say, we cause a lot of distress to the ears
We also make the throat much of a problem at night
Without us, your speech may not sound so nice
What are we? 
For the participant who is able to answer all the 4 organs
mentioned above, they'd get a special trophy
[/b]
Wah... got 4
Somehow, I feel that the one of them got to do with lungs. The
bronchioles, I think.