What is emphysema? | Respiratory system diseases | NCLEX-RN | Khan Academy

Emphysema is a chronic medical condition (most often caused by smoking and air pollution) where lung tissue is damaged and traps air inside the lung. Learn how shortness of breath, persistent cough, and wheezing are common symptoms of this condition and why they occur in emphysema. Created by Amy Fan. Watch the next lesson: https://www.khanacademy.org/test-prep... Missed the previous lesson? https://www.khanacademy.org/test-prep... NCLEX-RN on Khan Academy: A collection of questions from content covered on the NCLEX-RN. These questions are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at http://creativecommons.org/licenses/b.... About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s NCLEX-RN channel:    / @khanacademynclex-rn7898   Subscribe to Khan Academy: https://www.youtube.com/subscription_...