The term 'Lung Section' refers to the anatomical structure of the lungs, which are divided into lobes. The four-letter word for this is 'LOBE'. The lungs are divided into two lobes on the right side and two lobes on the left side. Each LOBE is further divided into smaller sections, such as the superior, middle, and inferior lobes. The lobes are connected by a network of airways and blood vessels. The lobes are responsible for the exchange of oxygen and carbon dioxide between the lungs and the bloodstream.