Nasal Accessory Sinuses
I had a question regarding the location of the ethmoid sinus the other day. This is one of the better diagrammatic skulls that I’ve seen that displays their position in relation to the face. On the inside edge of the orbit, the cells that have been laid bare are the ethmoidal air cells. The ethmoid sinus isn’t one single cavity within the skull, but several sets of air cells within the ethmoid bone, behind the nasal cavity. 
Diseases of the Nose and Throat. Herbert Tilley, 1919.

Nasal Accessory Sinuses

I had a question regarding the location of the ethmoid sinus the other day. This is one of the better diagrammatic skulls that I’ve seen that displays their position in relation to the face. On the inside edge of the orbit, the cells that have been laid bare are the ethmoidal air cells. The ethmoid sinus isn’t one single cavity within the skull, but several sets of air cells within the ethmoid bone, behind the nasal cavity. 

Diseases of the Nose and Throat. Herbert Tilley, 1919.

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    Guess who’s suffering from her sinuses right now?
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    My arch nemesis.
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    Diseases of the Nose and Throat. Herbert Tilley, 1919.
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