What the right pulmonary bronchus is slightly wider and has a steeper downward angle than the left?

The right pulmonary bronchus is slightly wider and has a steeper downward angle compared to the left bronchus because of the anatomical orientation of the lungs and the heart. This design allows for more efficient airflow into the right lung, which is larger than the left lung due to the space occupied by the heart on the left side of the thoracic cavity. The steeper angle also means that aspirated objects are more likely to enter the right bronchus.