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The lungs are located in the chest on either side of the heart. They are surrounded and protected by the ribcage. The left lung is a little smaller than the right lung because it shares space in the left side of the chest with the heart. Each lung is divided into sections (lobes).
The right lung has three sections or lobes, including the:
- Right upper lobe, which takes up the top third of the right lung
- Right middle lobe, which is the smallest of the three lobes and shaped like a triangle
- Right lower lobe, which is the largest of the three
The left lung is shaped slightly differently than the right. It has only two lobes - the left upper lobe and the left lower lobe.