What are the sinuses?

They are air filled pockets within the skull and face bones and they are lined with mucous membrane. They open into the nose or mouth, chiefly, and they can quite easily get irritated or infected, which can be painful.

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What are themes for World No Tobacco Day?

What are Themes for World No Tobacco Day?

For effectively celebrating the World No Tobacco Day all over the world, WHO selects a …

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