The lungs

I had to explain the main functions of the lungs. There were many interesting things I found out about lungs doing this assignment. First of all, the lungs are part of the respiratory system and their main function is to help us breath. Now first, the air comes in through the mouth or nose, goes down through the trachea, and this tube is then split into two, one of these tubes goes into one lung while the other goes through the other one, then these two tubes are split into smaller tubes and then into small air sacs where the air is carried to the rest of the body. In the air sacs, oxygen switches places with carbon dioxide, this is called GAS EXCHANGE. I also talked about some of the diseases which were, Emphysema, Pulmonary Embolism, Tuberculosis, and Bronchitis. I also talked about Asthma, in the bronchus, the muscles around the tubes tighten and makes it harder to breath, this causes coughing and lack of air.