Lungs
KScience
http://www.kscience.co.uk/animations/lungs.swf

Breathing
Medical Animation Library
University of Pennnsylvannia Health System
http://pennhealth.com/health%5Finfo/animationplayer/breathing.html

Coughing
Medical Animation Library
University of Pennnsylvannia Health System
http://pennhealth.com/health%5Finfo/animationplayer/coughing.html

Asthma Animation
1 on 1 Health
http://www.1on1health.com/web/info/asthma/english/asthma-animation/AnimationPage/LookListenLearnType=1

Images of the Lungs
American Lung Association
http://www.lungusa.org/site/c.dvLUK9O0E/b.22577/k.A3BE/Images_of_Lungs.htm

Tobacco
Inside theHuman Body: Respiratory System
The Lung Association
http://www.lung.ca/children/grades4_6/tobacco/index.html