Helium.com | View Eric Lannak's articles http://www.helium.com/users/400038.xml View Eric Lannak's articles en-us Copyright Helium.com Wed, 09 Dec 2009 08:00:14 GMT Wed, 09 Dec 2009 08:00:14 GMT The sinuses are usually written off as “four pairs of air-filled chambers in the facial bones that connect to the nose”, but for the 3... http://www.helium.com/items/1676923-what-do-your-sinuses-do Wed, 09 Dec 2009 08:00:14