numerous small hairs that help to prevent the entrance of dust and germs that are in the air we breath.
As the air passes through the nose, it is warmed and moistened. On the other hand, when we breath through the mouth, the air is not warmed and moistened before it enters the pharynx. This makes the pharynx dry and causes it to produce mucus. This leads to coughing and colds. A child who breaths through the mouth should be taken to a physician in order that the physician may examine the nose and throat and remove any adenoids that may be found.
