In fact, in each individual the right and left sinuses are generally different in size and shape. This variation depends upon individual genes just as we all have different fingerprints. The growth of each sinus is variable, therefore, each of our sinuses are different in size and shape.
The air within our sinuses exchanges constantly with air flowing through the nose. This pocket, which is connected to either the right or left nasal passage by the above channels, slowly enlarges and expands within the bone filling with air during this process. Sinuses actually begin to develop during the early years of life from an initial small pocket or pouch within the bones of the face. These channels permit air to flow from the nose into the sinuses and allow drainage of mucous from each sinus into the nose. Sinuses are air pockets that are located within the bones of the skull and face and are connected to your nasal passages by small tubes or channels, the osteomeatal complex.
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