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2. Sinus (anatomy) - Wikipedia

   en.wikipedia.org/wiki/Sinus_(anatomy)

   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.

3. Sphenoid sinus - Wikipedia

   en.wikipedia.org/wiki/Sphenoid_sinus

   The sphenoid sinus is a paired paranasal sinus in the body of the sphenoid bone. It is one pair of the four paired paranasal sinuses. [1] The two sphenoid sinuses are separated from each other by a septum. Each sphenoid sinus communicates with the nasal cavity via the opening of sphenoidal sinus.

4. Human nose - Wikipedia

   en.wikipedia.org/wiki/Human_nose

   The frontal sinuses are located in the frontal bone; the sphenoidal sinuses in the sphenoid bone; the maxillary sinuses in the maxilla; and the ethmoidal sinuses in the ethmoid bone. [2] [13] A narrow opening called a sinus ostium from each of the paranasal sinuses allows drainage into the nasal cavity. The maxillary sinus is the largest of the ...

5. Maxillary sinus - Wikipedia

   en.wikipedia.org/wiki/Maxillary_sinus

   The pyramid-shaped maxillary sinus (or antrum of Highmore) is the largest of the paranasal sinuses, located in the maxilla. It drains into the middle meatus of the nose [1] [2] through the semilunar hiatus. It is located to the side of the nasal cavity, and below the orbit. [2]

6. Confluence of sinuses - Wikipedia

   en.wikipedia.org/wiki/Confluence_of_sinuses

   The confluence of sinuses shows significant variation. [1] Most commonly, there is a continuous connection between all of the sinuses. [1] [2] A very common variant is the superior sagittal sinus only draining into the right transverse sinus - more rarely, it may also only drain into the left transverse sinus.

7. 6 of the best and 6 of the worst Christmas movies on Netflix ...

   www.aol.com/6-best-6-worst-christmas-120901378.html

   The holiday season is incomplete for many people without holiday movies. This year, Netflix is streaming a wide range of Christmas classics and original movies.