Normal human lung size size and human height, weight, body type and each person’s individual growth and development have a certain correlation, so there will be a certain difference, there is no fixed size of the lung size. 1. Lungs are the respiratory organs of the human body, the location of the lungs in the chest cavity of the human body, while distributed in the left and right sides, and connected to the human bronchial tubes. The left and right lungs also have some differences in morphology. The right lung is wide and short in morphology, while the left lung is narrower and longer, and the bronchial tubes on the left side are steeper and straighter, making it easy for foreign bodies to enter the right bronchial tube. 2. Generally speaking, the size of the adult lung is about 30cm, and the total breathing area is about 100m2. 3. The lungs can be further divided according to the interlobar fissures between the lobes. The left lung can be divided into two lobes, the upper and lower lobes, according to the horizontal fissure; the right lung is divided into three lobes, the upper, middle and lower lobes, according to the horizontal and oblique fissures.