Lung is a pair of large respiratory organ in the chest cavity of vertebrates who are breathing with air. In man, each of the lungs covered with a thin, cracked, so-called pleura is attached to the pulmonary atria and the lungs, and to the parenchyma of the main bronchi. Soft, light, spongy-rimy and flexible, there is normally some air in the lungs after birth. A healthy lung is crushed when it is compressed and floats when it is thrown into the water;
Whereas the lungs of diseased lungs and dead babies sink into the water/ismail.