How many lobes does the left lung have?

The left lung is anatomically distinct and consists of two lobes, which are named the upper lobe and the lower lobe. This configuration is primarily due to the presence of the heart, which occupies space on the left side of the thoracic cavity, necessitating a reduction in the number of lobes compared to the right lung. The right lung has three lobes (upper, middle, and lower) to accommodate the full volume of the thoracic cavity. The two lobes of the left lung are further divided into segments, but the total count of lobes remains two. This anatomical design is significant as it influences lung function and the approach to various medical conditions affecting the lungs.