To display the anatomy of swine lung lobes, especially the characteristics of bronchus, pulmonary arteries and pulmonary veins of each lung lobe, in order to provide reference for animal experiments of lobectomy.

The heart and lung organs of an adult pig were extracted to observe the structure of the lung lobes. Further, the lung of the pig was dissected at the level of lung lobes to observe the anatomical characteristics of the bronchus, pulmonary arteries and pulmonary veins.

Swine lungs are divided into left and right lungs. The left lung has 3 lobes, namely apical lobe, cardial lobe and diaphragmatic lobe, in which the left apical lobe and left cardial lobe are fused. The right lung has 4 lobes, namely apical lobe, cardial lobe, diaphragmatic lobe and accessory lobe. Each lobe has independent bronchus, pulmonary artery and pulmonary vein. The left apical lobe and left cardial lobe bronchus are co-stem, which is similar to the human left upper lobe bronchus. Two pulmonary arteries branch into the left apical lobe, and only one pulmonary artery branch into the left diaphragmatic lobe and each lobe of the right lung. There are two pulmonary veins in the right accessory lobe. One of the accessory pulmonary veins joins at the root of the pulmonary veins in the diaphragmatic lobe and enters the pericardium, while any of other pulmonary lobes has only one pulmonary vein.

The anatomical characteristics of bronchus, pulmonary arteries and pulmonary veins of swine lung are similar to those of human lung, and can be used as an animal model for lobectomy. Familiarity with the anatomy of swine lung is helpful to carry out relevant experiments and studies.