http://worldpeaceyogaschool.com - The nose is the body’s organ for ensuring that the air that enters the lungs is of sufficient purity and warmth not to cause harm. The air that we inhale is rarely suitable for entry into the lungs. It is generally too cold, too dirty and too germ-ridden. It is the function of the nose to rectify this situation. First of all, the air we breathe contains dust and small insects. These larger impurities are initially screened out by the vibrating hairs at the entrance to the nasal passages. These hairs vibrate in the opposite direction to the air as it enters the nose and prevent impurities from proceeding further. In the deeper regions of the nose there are special bony structures which are covered with a thick, spongy, germicidal mucus membrane, through which circulates a large, rich supply of blood. The mucus membrane follows a long winding air passage which ensures that all the inhaled air comes in contact with the membranes.