NASAL CARTILAGE SEGMENTED

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The nasal cartilages are typically divided into the following components:

Septal Cartilage: This is the major cartilage of the nasal septum, the structure that divides the nasal cavity into left and right sides. It's a flat, quadrangular piece of cartilage that contributes to the shape and of the nasal bridge and tip. It articulates with the perpendicular plate of the ethmoid bone and the vomer bone posteriorly.

Lateral Cartilages (Upper Lateral Cartilages): These are located on either side of the nasal septum and attach to the lower edge of the nasal bones. They are triangular in shape and provide to the middle third of the nose. They articulate with the septal cartilage medially and the maxilla laterally.

Alar Cartilages (Lower Lateral Cartilages): These paired cartilages define the shape of the nasal tip and nostrils. Each alar cartilage consists of a medial crus (leg), an intermediate segment (dome), and a lateral crus. The medial crura form the columella, the structure separating the nostrils. The lateral crura form the alae, or wings, of the nose.

Minor Alar Cartilages (Sesamoid Cartilages): These are small, variable cartilaginous plates located near the lateral crura of the alar cartilages. They are embedded in the fibrous tissue that connects the alar cartilages to the piriform aperture of the maxilla.

Function:

and Shape: The nasal cartilages provide structural to the nose, maintaining its shape and preventing collapse of the nasal ages.
Airflow Regulation: They contribute to the regulation of airflow through the nasal cavity.
Protection: They protect the underlying nasal tissues.
Flexibility: The cartilaginous nature of the nose allows for some flexibility, which is important for withstanding minor trauma.
Clinical Significance:

Nasal Fractures: Although the nasal bones are more commonly fractured, the nasal cartilages can also be injured in nasal trauma.
Deviated Septum: The septal cartilage can deviate from the midline, causing nasal obstruction and breathing difficulties.
Rhinoplasty: Nasal cartilages are frequently reshaped during rhinoplasty (nose surgery) to improve the appearance and/or function of the nose.
Nasal Obstruction: Collapse or weakness of the nasal cartilages can contribute to nasal obstruction.
Chondritis/Perichondritis: Infections or inflammation of the cartilage or its surrounding perichondrium can occur, leading to pain, swelling, and potential cartilage damage.
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