Answer: The lungs are divided into five lobes.
A. divided into seven lobes
B. divided into nine lobes
C. connected by the mediastinum
D. separated by the mediastinum
Explanation: Each lung is separated into lobes branching off the main bronchus; the right lung has three lobes, while the left has only two lobes. As the bronchi branch out, the total area of the two new branches is larger than its parent bronchus, making it extremely easy for the air to rush into the lungs.
