What is the name of the cartilaginous ridge in the trachea at which the right and left lungs split?

The name of the cartilaginous ridge in the trachea where the right and left bronchi split is referred to as the carina. This structure is significant because it marks the division of the trachea into the right main bronchus and the left main bronchus, directing airflow into each lung. The carina is equipped with sensory receptors that can trigger a cough reflex if irritants are detected, which is a protective mechanism for the respiratory system. Understanding this anatomical feature is crucial for medical professionals, as it is often involved in airway management and intubation procedures, especially when navigating the anatomy of the tracheobronchial tree.