the left lung is divided into 2 parts in mammals
The right lung is divided into three lobes (superior, middle and inferior), while the left lung is divided into two lobes (superior and inferior) allowing room for the heart.
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2!
Right now it is 1 whole. Back then it was divided into 5 parts
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.
it can be divided into three parts
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).
Moth is divided into three parts
It's divided into three main parts.
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IT is divided into five parts.
Each lung has more than one "lobe" or section. The right lung has three, and the left lung has only two to leave room for the heart where the upper left lobe would be.