Tracheal bifurcation

The tracheal bifurcation is the point where the trachea divides into two main bronchi, marking the transition between the upper and lower respiratory tracts.

The tracheal bifurcation is the caudal division of the trachea into the right and left main bronchi. This division is characterized by an internal cartilaginous ridge called the carina, which is visible endoscopically. It is located at the level of the heart base, generally at the height of the 4th or 5th thoracic vertebra, although its exact position may vary slightly depending on the species and the phase of respiration.