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The sinuses are lined with tiny hair-like structures called cilia, says Goudy, which work to move the mucus (along with bacteria and debris) out of the sinuses and the airway so it can drain out ...
Excess tears flow through the nasolacrimal duct which drains into the inferior nasal meatus. This is the reason the nose starts to run when a person is crying or has watery eyes from an allergy, and why one can sometimes taste eye drops. This is for the same reason when applying some eye drops it is often advised to close the nasolacrimal duct ...
The frontal sinuses, superior to the eyes, in the frontal bone, which forms the hard part of the forehead. They are innervated by the ophthalmic nerve (CN V1). [2] The ethmoidal sinuses, which are formed from several discrete air cells within the ethmoid bone between the nose and the eyes.
The four paired sinuses or air cavities can be referred to as: Ethmoid sinus cavities which are located between the eyes. Frontal sinus cavities which can be found above the eyes (more in the forehead region). Maxillary sinus cavities are located on either side of the nostrils (cheekbone areas). Sphenoid sinuses that are located behind the eyes ...
Normally, the sinuses drain into the nasal cavity through small ostia, which permit mucociliary clearance and ventilation that equilibrates pressure. However, when the opening is obstructed due to inflammation, polyps, mucosal thickening, anatomical abnormalities, or other lesions, pressure equilibration is impossible.
Recent research shows that air pollution and smoke can trigger chronic sinus inflammation or weaken the nose's natural filtration system, even in previously healthy people, said Kevin Hur, an ear ...