http://sunsetssong.blogspot.com/2012/10/artificial-neural-networks.html

All over your face, you have pocket-like spaces within your skull and facial bones. These sockets are all filled with air and are connected to your nasal passages. You call these sockets your sinuses (singularly referred to as a sinus). Like most of your internal body parts, you already have sinuses when you are born. They develop as you grow old, sometimes up until you are around 20 years of age.

You have four pairs of sinuses, also called cavities, surrounding your nasal passages. These are:
1) the maxillary sinuses located in your cheekbones just below your eyes;
2) the ethmoid sinuses between your eye sockets;
3) the sphenoid sinuses at the middle of the skull base around the back of your nose; and
4) the frontal sinuses in your forehead just above your eyebrows.

Each sinus is lined with a mucous membrane that you very well know is also present inside your nose. The mucous membrane is a thin layer of moist tissue that aids in providing moisture to the oxygen that you breathe in. It functions mainly to secrete mucus that in turn is tasked to trap germs, dusts and bacteria that are very much present in the air that you breathe. Your mucous membrane also plays ground host for the cilia, microscopic hairs that clear your sinuses of excessive mucus and sweep it back to your nose where you eventually swallow it.

While the actual functions of your sinuses are not distinguished medically and biologically, there have been discussions as to its benefits to your respiratory mucosa. Mainly, your sinuses are said to cause increased resonance in your voice to help you speak louder. They are also known to decrease the weight to the front of your skull, therefore lessening the impact when a physical blow is turned against your face.

Other debated functions of your sinuses include: the insulation of your eyes and dental roots from temperature changes around your nasal cavity; the regulation of pressure caused by intra-nasal and serum gas; and the heating of air that you breathe in to compensate for the slow turnover of oxygen in the sinus area.

As your sinuses are probably as sensitive as your actual nasal passage is, you would have to take care of them to avoid any infection that can cause you colds and headaches as well as affect your breathing and eventually your speaking voice. Get the best advice from your doctor about sinuses to get better.

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