Alar cartilages

Alar Cartilages are a pair of flexible structures that form part of the anatomy of the human nose. They are located in the lower third of the nose, and are responsible for the shape and flexibility of the nostrils.

Structure

The alar cartilages are composed of hyaline cartilage, a type of connective tissue that is both flexible and resilient. Each alar cartilage is shaped like a scroll, with a convex lateral surface and a concave medial surface. The upper part of each cartilage is attached to the septal cartilage and the lateral nasal cartilage, while the lower part is free and forms the rim of the nostril.

Function

The primary function of the alar cartilages is to provide structure and support to the nostrils. They allow the nostrils to remain open for breathing, while also enabling them to dilate and constrict in response to different physiological conditions. In addition, the alar cartilages contribute to the overall shape and appearance of the nose.

Clinical significance

Abnormalities or injuries to the alar cartilages can result in a variety of nasal deformities, such as a deviated septum, saddle nose, or boxer's nose. These conditions can cause breathing difficulties and may require surgical intervention. The alar cartilages are also a key consideration in rhinoplasty, a type of plastic surgery that reshapes the nose.

See also

• Nasal cartilage
• Nasal septum
• Rhinoplasty