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Emphysema is a lung disease that, over a long period of time, leads to shortness of breath because of excessive inflation of the alveoli, which are air sacs inside the lungs, reports eMedicineHealth. Over time, the disea... More »

Emphysema is caused by prolonged exposure to smoke, fumes and air pollution, says the Mayo Clinic. People who smoke are the most likely to develop emphysema. In rare cases, a congenital condition involving a protein defi... More »

According to WebMD, symptoms of emphysema include shortness of breath, wheezing, coughing and chest tightness or pain. Other less common symptoms are loss of appetite, weight loss, depression, poor sleep quality and decr... More »

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Pulmonary alveoli are the tiny sacs inside the lungs that fill with air with each breath and facilitate the exchange of gas with the blood. According to HowStuffWorks, the oxygen concentration in the alveoli is high, rel... More »

Pulmonary edema is the medical term used to refer to the accumulation of fluid in the lungs, specifically in the alveoli or air sacs, according to Medical News Today. It affects gas exchange and makes breathing difficult... More »

Sarcoidosis of the lung means that there are areas of inflammation in the air sacs, or alveoli, of the lungs, according to the American Lung Association. Inflammation can also appear on the bronchi, or air tubes, or the ... More »

Pneumococcal pneumonia is inflammation in the alveoli, or air sacs, of the lung caused by the Streptococcus pneumoniae bacteria, reports MedicineNet. People who are younger than 5 years old, older than 65 years old or ar... More »