Final answer:
The right lung is divided into three lobes: the superior, middle, and inferior lobes. The left lung has two lobes, allowing space for the heart.
Step-by-step explanation:
The right lung is divided into three lobes. These lobes are named the superior, middle, and inferior lobes, and they are separated by fissures. The left lung, on the other hand, consists of just two lobes, known as the superior and inferior lobes. The reason for the difference in the number of lobes is to accommodate the space occupied by the heart. The cardiac notch of the left lung provides space for the heart, thus the left lung is smaller with one less lobe.