Answer:
air chambers in your head
Explanation:
Your sinuses are air chambers in your head. They are located behind your cheekbones and your forehead. These small chambers lead to your nose. When the lining in these small chambers become inflamed they block all the mucus from travelling to your nose and is what causes sinusitis. This is a common problem when an individual has the flu or a common cold, or when they have a sinus infection.
