The nose is the organ of smell and is part of the peripheral nervous system. The external part of the nose lies above the roof of the mouth.
The nose consists of:
*external meatus - triangular-shaped projection in the center of the face
*external nostrils - two chambers divided by the septum
*septum - made up primarily of cartilage and bone and covered by mucous membranes. The cartilage also gives shape and support to the outer part of the nose.
*nasal passages - passages that are lined with mucous membranes and tiny hairs (cilia) that help to filter the air
*sinuses - four pairs of air-filled cavities that are also lined with mucous membranes
It can spread germs and cause bloody noses.So it is important not to pick your nose.
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