The sinuses
A) open into the internal nose, giving nasal secretions a pathway in which to drain.
B) are filled with air, which offers protection to the brain.
C) contain tiny projections to support the bones of the face.
D) are filled with air and act as resonators for sound production.

Question

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The Answer of The sinuses
A) open into the internal nose, giving nasal secretions a pathway in which to drain.
B) are filled with air, which offers protection to the brain.
C) contain tiny projections to support the bones of the face.
D) are filled with air and act as resonators for sound production.

The Sinuses