What are the functions of the sinuses?

A. to lighten the skull and drain fluid from the brain
B. to allow the brain to expand and to lighten the skull
C. to give a resonant sound to the voice and to allow the brain to expand
D. to drain fluid from the brain and to allow the brain to expand
E. to lighten the skull and give a resonant sound to the voice


Answer: E

Biology & Microbiology

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