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Interactive diagrams show sinus cavity locations and help visualize sinusitis, the most common type of sinus infection. We also go over sinusitis signs and care.
There are four paired sinuses (named for the skull bones in which they are located) in the human head: Frontal sinuses: The right and left frontal sinuses are located near the center of the...
Near the sinuses, there are several crucial structures: Tear Duct (Nasolacrimal Duct) : It drains tears from the inner corner of the eye into the nasal cavity. Eustachian Tube: This tube helps equalize pressure in the ears and opens into the nasopharynx.
The paranasal sinuses are air filled extensions of the respiratory part of the nasal cavity. There are four paired sinuses, named according to the bone they are located in; maxillary, frontal, sphenoid and ethmoid.
Your paranasal sinuses (or just your “sinuses,” as most people call them) are four paired cavities in your face. They include the frontal, sphenoid, ethmoid and maxillary sinuses. Together, they make mucus that drains your nose, keeping it free of germs and allergens.
3/14. What Is Sinusitis? It’s inflammation in your sinuses. Tiny, hair-like structures called cilia (magnified here) move mucus across sinus membranes and toward an exit. All of your sinus...
Anatomy. The nasal cavity is a potential space situated above the oral cavity and hard palate and below the skull base and intracranial compartment. It is separated in the midline by the nasal septum into a right and left side.
A sinus is a sac or cavity in any organ or tissue, or an abnormal cavity or passage. In common usage, "sinus" usually refers to the paranasal sinuses, which are air cavities in the cranial bones, especially those near the nose and connecting to it. Most individuals have four paired cavities located in the cranial bone or skull.
Sinuses are hollow, air-filled cavities that are located throughout the skull. There are several sets of sinuses in the head. The maxillary sinuses are behind the cheeks. The ethmoid sinuses lie under the inside corners of the eyes. The sphenoid sinuses are located behind the ethmoid sinuses.
Most people have four pairs of sinus cavities in their heads ― or eight total. Two large frontal sinuses are located above your eyes and in your forehead. Two sphenoid and two ethmoid sinuses are set between your eyes and behind your nose.