The nose is actually much larger than it seems from the outside The nose is actually much larger than it seems from the outside. It is a passageway that leads from the nostrils to the back of the throat, and is more like a large cave than a simple tunnel- wide and tall in the middle. The purpose of the nose is to clean, warm and moisten the air we inhale in order to keep the lungs healthy. To do this, the lining of the nose must constantly be kept covered with a thin layer of a fluid called mucus. The nose produces a lot of this mucus each day, most of which we simply swallow as it drains out the back of the nose. When the mucus gets dried out, it can form crusts. Mucus may drain out of the front of the nose if there is a blockage in the back, or if the nose is producing more mucus than usual. Blockage of the drainage in the back of the nose is usually caused by large adenoids in children. The adenoids are like a third tonsil, that sits up high behind the roof of the mouth. Other things that can cause blockage in the nose include an abnormally small nasal pathway, swollen tissue lining the sides of the nose (the turbinates) or a deviated septum (the wall between the nostrils). A small child who always has foul smelling drainage from only one nostril may have a foreign body stuck in the nose (such as a piece of plastic or food).

The sinuses (also known as the paranasal sinuses) are a number of air filled spaces in the bones of the face that surround and drain into the inside of the nose. At birth these sinuses are very small. They continue to enlarge throughout childhood, and are not fully developed until late adolescence. No one knows what the purpose of the sinuses is, but they may help to make the head lighter (by replacing bone with air), improve the resonance of the voice, or provide a larger surface area for the lining of the nose to help with cleaning, warming and humidifying the air we breath. There are four paired sets of sinuses. The maxillary sinuses are large spaces located behind the cheek between the upper teeth and the eyes. The ethmoid sinuses are a series of small cavities between the eyes. The maxillary and ethmoid sinuses are present at birth (but fairly small) and enlarge as the child grows. The sphenoid sinuses are deep inside the head, at the back of the nose. The frontal sinuses are in the forehead, and do not develop until the child is older.

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Olfactory nerve Did you know that approximately 95% of the nasal cavity has nothing to do with smell? Most of the area of the nasal cavity serves the function of warming and filtering air before it reaches the lungs. It does this with the help of the mucosa, which lines the walls of the nasal cavity. Within this mucosa, small, hair-like cilia move in a wave-like motion, moving mucus to the back of the throat. Dust, bacteria, and other chemicals get trapped in the mucus and are denatured by stomach acid once the mucus is swallowed.

The nose is actually much _________ than it seems from the outside The nose is actually much _________ than it seems from the outside. It is a passageway that leads from the nostrils to the back of the ____________, and is more like a large cave than a simple tunnel- wide and tall in the middle. The purpose of the nose is to ___________________________ the air we inhale in order to keep the _________ healthy. To do this, the lining of the nose must constantly be kept covered with a thin layer of a fluid called ___________. The nose produces a lot of this mucus each day, most of which we simply ___________ as it drains out the back of the nose. When the mucus gets dried out, it can form ___________. Mucus may drain out of the front of the nose if there is a blockage in the back, or if the nose is producing more mucus than usual. Blockage of the drainage in the back of the nose is usually caused by large adenoids in children. The adenoids are like a third tonsil, that sits up high behind the roof of the mouth. Other things that can cause blockage in the nose include an abnormally small nasal pathway, swollen tissue lining the sides of the nose (the turbinates) or a deviated septum (the wall between the nostrils). A small child who always has foul smelling drainage from only one nostril may have a foreign body stuck in the nose (such as a piece of plastic or food).

The sinuses (also known as the paranasal sinuses) are a number of _______________ in the bones of the face that surround and drain into the inside of the _________. At birth these sinuses are very small. They continue to enlarge throughout childhood, and are not fully developed until late adolescence. No one knows what the purpose of the sinuses is, but they may help to make the head __________ (by replacing bone with air), improve the resonance of the ____________, or provide a larger surface area for the lining of the nose to help with ________, _____________ and _______________ the air we breath. There are four paired sets of sinuses. The _____________ sinuses are large spaces located behind the cheek between the upper teeth and the eyes. The _____________ sinuses are a series of small cavities between the eyes. The maxillary and ethmoid sinuses are present at birth (but fairly small) and enlarge as the child grows. The ____________ sinuses are deep inside the head, at the back of the nose. The _____________ sinuses are in the forehead, and do not develop until the child is older.