Why do we need sinuses in our facial bones? Describe why fluid in the maxillary sinus or a sinus infection cause teeth to ache?

Sinus cavities allow for voice resonance

They help filter and add moisture to any air that is inhaled through the nasal passages and in the removal of unwanted particles from the sinus cavities.

Sinus cavities lighten the skull.

Explanation:

Sinus infection tooth pain occurs when the fluid that builds up in the sinus cavities during a sinus infection puts pressure on your upper teeth.

the answer to your question is (pancreas).