paranasaalisiin
Paranasaalisiin refers to the paranasal sinuses, which are air-filled cavities located within the bones of the skull, surrounding the nasal cavity. These sinuses are lined with mucous membranes and are connected to the nasal cavity by small openings called ostia. The primary function of the paranasal sinuses is not fully understood, but it is believed they lighten the weight of the skull, contribute to voice resonance, and help warm and humidify inhaled air.
There are four main pairs of paranasal sinuses: the frontal sinuses located in the forehead, the maxillary
Inflammation or infection of the paranasal sinuses is known as sinusitis. This condition can cause symptoms