The related article from Ear, Nose, & Throat Associates of Corpus Christi really explains it well. According to them and the Sinus Wars site:
There are two easy to explain reasons we have sinuses: The first is to lighten the weight of the skull. If the skull were solid, our neck would not be able to hold it upright. Secondly, the sinuses play a role in speech. They are, in effect, resonating chambers to help create our voice timbre and pitch.
Believe it, or not, to make the skull lighter.
the function of the sinuses are reduction in weight and cooperation in skull resonance
they reduce the weight of the skull and produce mucus for the nasal passage and also they moisturize the air taken in through the nose.
to warm and moisten air
paranasal sinus include frontal sinus, the maxillary sinus, the ethmodial sinuses, and the spheniodal sinus.
The maxillary sinus
paranasal sinus include frontal sinus, the maxillary sinus, the ethmodial sinuses, and the spheniodal sinus.
In health, be sure you are talking about the correct "sinus" The heart has a sinus, so please be specific about which sinus you are referring to.
The plural of sinus is sinuses.
sinus infection
The maxillary sinus
somebody answer this question fast!!
Thrombosis: Blood clot Sinus: A sack/avity in an organ or tissue deep sinus thrombosis: a deep bloodclot in a sinus...
no
The purpose of the sinuses is unclear, they may help to humidify the air we breath or they may enhance our voices.
Sinus nodes (sa nodes)