Left vs. Right Lung Anatomy: A Detailed Comparison

Left Lung:

- Slightly smaller than the right lung

- Consists of two lobes: the upper lobe and the lower lobe

- The upper lobe is further divided into three segments: the apical segment, the anterior segment, and the posterior segment

- The lower lobe is divided into four segments: the superior lingula segment, the inferior lingula segment, the lateral segment, and the medial segment

- The heart rests on the left lung, so the left lung has a cardiac notch

- The left lung also has a lingula, which is a small triangular projection that separates the upper and lower lobes

Right Lung:

- Slightly larger than the left lung

- Consists of three lobes: the upper lobe, the middle lobe, and the lower lobe

- The upper lobe is further divided into three segments: the apical segment, the posterior segment, and the anterior segment

- The middle lobe is divided into two segments: the lateral segment and the medial segment

- The lower lobe is divided into four segments: the superior segment, the medial basal segment, the lateral basal segment, and the posterior basal segment

- The right lung does not have a cardiac notch because there is no heart resting on it