"Cigarettes remain the only consumer product sold legally in the United States
that is unequivocally carcinogenic when used as directed."
New England Journal of Medicine; MacKenzie et al; Vol. 130; No 14; Pg 977
The Dope on Nicotine

The Lungs and Respiratory System

Please click-on from the following list of Respiratory System Web Sites.

1) Lungs and Respiratory System

2) Lungs

3) Anatomy and Physiology of the Lungs

4) University of Utah Department of Pathology - The Lungs: Normal and Diseased

5) Take a look at atherosclerosis of the aorta

B(center):Fiberoptic bronchoscopy shows a large mucous plug blocking right main bronchus.
A(left):Chest X-ray shows collapsed right lung due to mucous plug.
C(right):Chest X-ray following removal of mucous plug, right lung fully expanded.