How Do My Sinuses Work?
The sinuses are air-filled cavities in the facial bones, whose most important purpose is to produce slime that wets the inside of the nose. But they also reduce the weight of the skull and function as a resonance chamber for the voice. Moreover, the sinuses are believed to have a protective effect as a kind of buffer against blows to the face, and they protect the eyes and tooth roots against quick temperature changes in the surroundings. We are born almost without sinuses, but they grow throughout childhood and life as such, as the bone tissue gradually breaks down.
The sinuses are made up of 4 pairs of air-filled cavities in the facial bones.