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| middle ethmoidal cells (cellulae ethmoidales mediae); middle ethmoidal sinuses (cellulae ethmoidales mediae); sinus ethmoidales medii (cellulae ethmoidales mediae); middle ethmoidal air cells (cellulae ethmoidales mediae) | |||
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| middle ethmoidal cells (cellulae ethmoidales mediae); middle ethmoidal sinuses (cellulae ethmoidales mediae); sinus ethmoidales medii (cellulae ethmoidales mediae); middle ethmoidal air cells (cellulae ethmoidales mediae) | |||