Lungs breathing video or Lungs inflation abstract video. The lungs are a pair of spongy, air-filled organs of the respiratory. In mammals and most other vertebrates, two lungs are located near the backbone on either side of the heart. Their function in the respiratory system is to extract oxygen from the atmosphere and transfer it into the bloodstream, and to release carbon dioxide from the bloodstream into the atmosphere, in a process of gas exchange. Polymime are one of the UK's top animation companies offering royalty free medical stock images and medical stock videos. Other services including 3D rending, interactive 3D, vfx and more.