What function do the maxillary sinuses serve?

The maxillary sinuses play a key role in the respiratory system by producing mucus for the nasal cavity. This mucus serves to moisten and protect the nasal passages, trapping dust, allergens, and pathogens, which helps to maintain a clear airway and supports overall respiratory health.

The maxillary sinuses are air-filled cavities located within the maxillary bones (the bones that form the upper jaw) and are part of the paranasal sinus system. Their connection to the nasal cavity allows for the drainage of the mucus they produce, which helps to keep the nasal cavity moist and functioning properly.

Other functions of the sinuses include reducing the weight of the skull, protecting vital structures beneath them, and contributing to voice resonance, but the primary and immediate function relevant to the question is mucus production for the nasal cavity.