The paranasal sinuses have two functions: they lighten the bones of the skull and also drain trapped particles into the nasopharynx.

Name: The paranasal sinuses have two functions: they lighten the bones of the skull and also drain trapped particles into the nasopharynx.
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Question

Quizplus · Accepted Answer

The paranasal sinuses have multiple functions, including lightening the skull, producing mucus to trap particles, and resonating the voice, but they drain into the nasal cavity, not directly into the nasopharynx.

The Paranasal Sinuses Have Two Functions: They Lighten the Bones