MCQ IN MEDICINE

Detailed explanation-1: -In the mediastinum, at the level of the fifth thoracic vertebra, the trachea divides into the right and left primary bronchi.

Detailed explanation-2: -From the carina, the trachea bifurcates into the left and right bronchi.

Detailed explanation-3: -The carina occurs at the lower end of the trachea-usually at the level of the 4th to 5th thoracic vertebra. This is in line with the sternal angle, but the carina may raise or descend up to two vertebrae higher or lower with breathing.

Detailed explanation-4: -The most inferior portion of the trachea, the bifurcation, is called the carina. It lies slightly to the right of the midline at the level of the fourth or fifth thoracic vertebra posteriorly and sternomanubrial junction anteriorly.