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Each lung is divided into lobes by fissures. The right lung has three lobes separated by two fissures (horizontal and oblique), while the left lung has two lobes separated by one oblique fissure.
Horizontal fissure of the right lung and Oblique fissure of right lung.
There is 3 lubes in the left lung
After the mainstem bronchus, two secondary bronchi supply the left lung (and three supply the right lung).
The right lung is shorter than the left by 1 inch (2.5 centimeters) however, the total capacity of the right lung is greater than the left. The right lung has three lobes, the left lung has two. If you need to know the "why" then its simply in the human genetics that your lungs will never be identical unless you suffer from a mutation of the genes
The right lung has three lobes.
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right lung=3lobes left lung has 2lobes
to accommodate the heart
The right lung contains three lobes. The left lobe only has two. Because of the heart on the left side, the left lung only has two lobes to make more room for the heart to pump on that side.
total lobes are six
The right lung has 3 lobes. This is in contrast to the left lung, which only has 2 in order to make room for the heart, which is located in the left side of the chest cavity.