Each lung lies within its own side of the thoracic cavity, enclosed within its own pleural sac (Fig 1a).

The right lung is larger than the left, which is deeply concave on its anteromedial border to accommodate the contents of the mediastinum.

The lungs are divided into lobes.

Question: How many lobes does each lung have?

Answer

Each lung lies within its own side of the thoracic cavity, enclosed within its own pleural sac (Fig 1a).

The right lung is larger than the left, which is deeply concave on its anteromedial border to accommodate the contents of the mediastinum.

The lungs are divided into lobes.

Question: How many lobes does each lung have?

Answer: The right lung is divided into three lobes and the left lung into two lobes, plus the lingula: the remnant of the left middle lobe (Fig 1b).