A simple video that gives us details on how our lungs work. Our lungs are very essential on our daily life for it is the one that supplies us oxygen to our body. The main concern of this video is to provide fundamental knowledge on how our lungs work. It also perfectly explains the feature and characteristic of lungs. It states that lungs have no muscle and the main muscle responsible for its contraction and expansion movement is by the work of our thin muscle diaphragm. If you are wondering how this respiratory organ works, well you have to watch this video and learn what happens to the air you are breathing.