Question

Which of the following is NOT true about the right principal (main) bronchus?

• A. Shorter
• B. Wider
• C. More horizontal
• D. In the line of trachea

Hint:

The right bronchus is wider, shorter and more vertical; horizontal describes the left.

Answer 1

The Correct Option is C

Step 1: Recall the airway split. At the carina the windpipe divides into two main bronchi that are deliberately asymmetric in size and slope.

Step 2: Right side profile - broad bore, only about 2.5 cm in length, and steeply downward so it continues nearly straight from the trachea (roughly 25 degrees off the midline). This steep angle is the reason aspirated objects favour the right lung.

Step 3: Left side profile - slimmer, around 5 cm long, and set at a flatter slant (roughly 45 degrees off the midline), giving it a more horizontal run as it heads toward the left hilum.

Step 4: Match the options to the right bronchus. Shorter (yes), wider (yes), and in the line of the trachea (yes) all fit the right bronchus. "More horizontal" belongs to the left bronchus, so it is the false statement about the right bronchus.

\[\boxed{\text{More horizontal (this describes the left bronchus, not the right)}}\]