Each lung contains fissures that divide the lungs into three (right lung) or two (left lung) sections known as lobes. The lobes are subdivided into segments, and segments are further split into lobules. One bronchial tube leads to your left lung, the other to your right lung.

Humans have two lungs, a right lung and a left lung. They are situated within the thoracic cavity of the chest. The right lung is bigger than the left, and the left lung shares space in the chest with the heart.