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paranasal sinus
English Wikipedia - The Free Encyclopedia
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Paranasal sinuses
Paranasal sinuses
are a group of four paired
air-filled spaces
that surround the
nasal cavity
. The
maxillary sinuses
are located under the
eyes
; the
frontal sinuses
are above the eyes; the
ethmoidal sinuses
are between the eyes and the
sphenoidal sinuses
are behind the eyes. The sinuses are named for the
facial bones
in which they are located.
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