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sphenoid bone (1)
a bat-shaped bone that extends behind the eyes and forms part of the base of the skull
ethmoid bone (1)
a thin delicate cancellous bone that forms the nasal cavity and part of the orbits of the eyes
palatine bones (2)
form the back part of the roof of the mouth and the floor and side walls of the nose
inferior concha (2)
form the ledge along the inside of the side wall of the nose, below the middle concha
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