Nakakuki S
Department of Veterinary Anatomy, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Japan.
J Vet Med Sci. 1994 Aug;56(4):675-9. doi: 10.1292/jvms.56.675.
In the lung of the cow (Holstein), the right and left bronchi have the dorsal, lateral, ventral and medial bronchiole systems, respectively. Furthermore, the right lung has a tracheal bronchiole (bronchus). From the standpoint of bronchial ramifications, a bilobed cranial lobe and the middle, caudal and accessory lobes can be discriminated in the right lung, whereas a bilobed middle lobe and a caudal lobe can be discriminated in the left lung. The left cranial lobe is lacking. The right pulmonary artery runs obliquely across the ventral side of the trachea caudally to the origin of the cranial lobe bronchiole. It then runs across the dorsal side of the right middle lobe bronchiole, and thereafter along the dorsolateral side of the right bronchus. During its course, it gives off arterial branches running mainly along the dorsal or lateral side of each bronchiole. The left pulmonary artery runs the same course as that in the right lung. The pulmonary veins run mainly along the ventral or medial side of the bronchiole.
在奶牛（荷斯坦牛）的肺中，右支气管和左支气管分别具有背侧、外侧、腹侧和内侧细支气管系统。此外，右肺有一条气管细支气管（支气管）。从支气管分支的角度来看，右肺可分为两叶的颅叶以及中叶、尾叶和副叶，而左肺可分为两叶的中叶和尾叶。左颅叶缺失。右肺动脉斜向穿过气管腹侧，位于颅叶细支气管起点的尾侧。然后它穿过右中叶细支气管的背侧，此后沿着右支气管的背外侧走行。在其行程中，它发出主要沿每个细支气管背侧或外侧走行的动脉分支。左肺动脉的走行与右肺相同。肺静脉主要沿细支气管的腹侧或内侧走行。
