Your sinuses keep you healthy!
The sinuses are open spaces in your skull around and behind your eyes and nose. They function to humidify the air we breathe and to remove harmful particles like dust, bacteria and viruses before the air reaches your lungs. The sinus cavities and passages are lined with mucous membranes that secret a sticky fluid (mucus) that traps the foreign particles. The fluid drains out of the cavities through the open passageways.