Pulmonologist Dr. Ravi Kalhan, MD answers the internet's burning questions about our lungs. Why do we yawn and why is it contagious? How do lungs heal after a smoker quits? What chemicals actually ...

Barrier organs that form boundaries between the body and the outside environment, such as the lungs, skin, and intestines, ...

For the first time, scientists have directly measured how smoking changes the mechanical behavior of human lung tissue.

Red blood cells carry oxygen from the lungs to every other organ, and blood-forming stem cells must make about 200 billion new red blood cells each day to keep the oxygen flowing. For many years, ...

Lung volume reduction surgery (LVRS) is a treatment for end-stage lung disease caused by emphysema. Emphysema is a type of chronic obstructive pulmonary disease (COPD) that causes shortness of breath ...

Lung cancer typically spreads locally within the lungs first, migrating through the airways to other areas of the same lung. In some cases, it can then move to the lining of the lung. When lung cancer ...