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17 Απρ 2024 · Carina of trachea. Structures of the larynx, trachea and bronchi seen from an anterior and posterior views. The carina of the trachea is a cartilaginous projection of the last tracheal ring, found at the bifurcation of the trachea into the left and right main (primary/principal) bronchi.
The carina is a cartilaginous ridge separating the left and right main bronchi that is formed by the inferior-ward and posterior-ward prolongation of the inferior-most tracheal cartilage. [2] The carina occurs at the lower end of the trachea - usually at the level of the 4th to 5th thoracic vertebra.
The right main bronchus has a length of 2.5 cm, and the left main bronchus is 5 cm long. The trachea divides at the carina (at the level of the sternal angle) to give rise to the two primary bronchi – the right and left bronchus (figure 4).
The carina of trachea, or carina, is a C-shaped ridge of cartilage on the trachea. Carina in Latin translates to mean ''keel of a boat,'' or the ridge that runs alongside the bottom...
The carina is a raised structure that contains specialized nervous tissue that induces violent coughing if a foreign body, such as food, is present. Rings of cartilage, similar to those of the trachea, support the structure of the bronchi and prevent their collapse.
The carina dividing the bronchus to right upper lobe and right bronchus intermedius is termed RC 1 (right carina 1) and the carina between right middle lobar bronchus and bronchus to right lower lobe is termed RC 2 (right carina 2).
The trachea serves as a conduit for ventilation and the clearance of tracheal and bronchial secretions. The trachea begins at the lower border of the cricoid cartilage and extends to the level of the carina . It is composed of C-shaped cartilaginous rings that form the anterior and lateral walls.
