Lung Anatomy

Although most of the things in the body that exist in pairs are mirror images of each other the lungs are not. The right lung, which contains about 55% of the body’s breathing capacity has three lobes – the upper, middle, and lower.

The left lung by contrast has only two lobes – the upper and lower. There is a small extra part on the bottom of the upper lobe in the left lung called the lingula that probably far back in evolution was once the left middle lobe.