Bony chambers, lined by respiratory epithelium, that open into the nasal cavity; the frontal, ethmoidal, sphenoidal, and maxillary sinuses.
The hollow cavities within the cranial bones that surround and empty into the nasal cavity.
Air-filled extensions of the respiratory part of the nasal cavity into the frontal, ethmoid, sphenoid, and maxillary cranial bones. They vary in size and form in different individuals and are lined by the ciliated mucus membranes of the nasal cavity.
Air spaces within the skull.
Air-filled areas of the respiratory part of the nasal cavity that extend into the bones of the head (frontal, ethmoid, sphenoid, and maxillary), and vary in size and form in different individuals.
Hollow spaces in the bones of the face and skull near the nose that sometimes become infected, causing sinusitis.
Airspaces in the base of the skull in communication with the air passages of the nose.
Sinuses in the bone of the face and head lined with mucous membrane derived fromand continuous with the mucous lining of the nose
Nasal chambers that act to filter, warm, and humidify incoming air.
Hollow, air-filled spaces located within the bones of the face surrounding the nasal cavity. There are four pairs of cavities, called paranasal sinuses, each of which is connected to the nose by small openings.
The mucosa-lined cavities in the bones of the skull that open into the passages of the nose.