What are the air-filled cavities located in some bones of the face and cranium called?

The air-filled cavities located in some bones of the face and cranium are known as sinuses. These structures serve several important functions, including lightening the weight of the skull, enhancing resonance in the voice, and providing a buffer against facial trauma. Sinuses are specifically located in bones like the maxilla (maxillary sinus), frontal bone (frontal sinus), ethmoid bone (ethmoidal sinuses), and sphenoid bone (sphenoidal sinus).

The term "cavities" is too broad and does not specifically refer to the anatomical structures recognized as sinuses. Likewise, "maxillary spaces" could refer to several different anatomical features, but they are not the term used to describe the air-filled sinus cavities broadly. Lastly, "cranial voids" does not accurately describe the sinuses and could imply general empty spaces rather than the specialized air-filled cavities that have a defined structure and purpose. Thus, the precise anatomical term for these air-filled cavities is sinuses.