What is the term for the top of the lung?

The term for the top of the lung is "apex." The apex refers to the uppermost portion of the lung that extends slightly above the first rib and into the root of the neck. This anatomical feature plays a critical role in lung function as it helps in the overall shape and capacity of the lungs during the respiratory process. Understanding the regions of the lung, including the apex, is essential for comprehending how the lungs are organized and how they interact with other structures in the thoracic cavity. The base, on the other hand, is the lower part of the lung that rests on the diaphragm, while the hilum refers to the area where the bronchi, blood vessels, and nerves enter and exit the lung. The term "crest," while it may suggest a peak or top feature, is not used in the context of lung anatomy.