CT Images (IMAGE) Woods Hole Oceanographic Institution Caption The team was able to see how the marine mammals' lung architecture creates two pulmonary regions: one air-filled and the other collapsed. The researchers believe that blood flows mainly through the collapsed region of the lungs. The terrestrial pig did not show that structural adaptation. Credit Photo by Andreas Fahlman, © Woods Hole Oceanographic Institution Usage Restrictions with proper credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.