Functional importance of maxillary sinus is______________?

Bone, AMJ And Maxillary Sinus 15/12/2020

A. Lightening of skull weight and production of bactericidal lysozyme to the nasal cavity
B. Protects the brain against exposure to cold air by arresting air in sinus temporarily
C. Resonance of voice and enhancement of faciocranial resistance to mechanical shock
D. All of the above

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