Lung segment

The lung segment (segmentum pulmonis) is one of the three main segments into which the left and right human lung is divided. Each segment consists of a lobe of the lung, which has its own structural features and functions. The lung segments form the pulmonary acinus.

The lung segment consists of two lobes of the lung: upper and lower. The upper lobe is located closer to the heart, and the lower lobe is closer to the diaphragm. Each lobe of the lung has its own structure and function.

The upper lobe of the lung consists of large bronchi that come from the trachea, small bronchi and bronchioles that form the lung acinus. The acini is a structural and functional unit of the lung, consisting of alveoli and vessels. In the upper lobe of the lung there are bronchioles, which pass into small bronchi and large bronchi.

The lower lobe of the lung also consists of large and small bronchi, but they do not form the structural and functional unit of the lung, as in the upper lobe. The lower lobe of the lung performs mainly the function of gas exchange and mucus formation.

Each lobe of the lung has its own characteristics and functions, which depend on its location in the lung. For example, the upper lobe of the lung is involved in the formation and release of air, while the lower lobe performs the function of gas exchange.

Thus, the lung segment is the main structural and functional unit, which consists of two lobes of the lungs, each of which has its own characteristics and performs certain functions. Knowledge of the structure and function of lung segments is important for understanding lung function and disease.