External nose

External Nose

The external nose is the protruding part of the face that houses the nostrils and is used for breathing and smelling. It is a prominent facial feature and plays a crucial role in the respiratory system. The external nose is made up of bone and cartilage and is covered by skin. It is divided into two nostrils by the nasal septum.

Anatomy of the External Nose

The external nose is made up of the nasal bone, the lateral nasal cartilage, the greater alar cartilage, and the lesser alar cartilage. The nasal bone forms the bridge of the nose, while the cartilages give shape to the lower part of the nose. The skin covering the nose varies in thickness, being thinner at the bridge and thicker towards the nostrils.

Nasal Bone

The nasal bone is a small oblong bone that forms the bridge of the nose. It articulates with the frontal bone and the maxilla.

Lateral Nasal Cartilage

The lateral nasal cartilage is a triangular-shaped cartilage that is located below the nasal bone and gives shape to the middle part of the nose.

Greater Alar Cartilage

The greater alar cartilage forms the lower part of the nose and gives shape to the nostrils.

Lesser Alar Cartilage

The lesser alar cartilage is a small cartilage that is located inside the nostrils and helps to keep them open.

Function of the External Nose

The primary function of the external nose is to facilitate breathing by filtering and humidifying the air that enters the body. It also plays a role in the sense of smell.

Diseases and Conditions

There are several diseases and conditions that can affect the external nose, including rhinoplasty, nasal fractures, nasal polyps, and deviated septum.

See Also

• Nose
• Nasal cavity
• Respiratory system

External nose Resources
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