[Structural organization of a human lung lobule]

Structure and number of human lung lobules were investigated in corrosion preparations and by the method of 3-dimensional reconstruction using serial sections. It was established that the bronchial tree branches inside the lobules 4 to 6 times forming 3 to 5 orders of intralobular bronchioles and 1 order of terminal bronchioles. Structure of lobules in all human lung lobes is identical and has a repeating group of bronchial branches as a basis. The lung lobule consists of 8 to 20 acini. In the right lung the average of lobules numbers is 1200.