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Junior Cert: Respiration and Breathing

Smokers Lungs vs Healthy Lungs Wonderful 10 second clip comparing two different lungs 5 Star
Interactive drag and drop of the parts of the respiration system Nice activity from skoool.ie  
To compare the level of carbon dioxide in inhaled and exhaled air YouTube first 3 mins 3 Star
Plant sprouts in a man's lung 2 min video. He thought he had lung cancer 5 Star
How oxygen gets transferred aound the body by red blood cells.

And in particular how pressure differences control the movement in and out of tissues. A little technical however.
3 min video from YouTube.

4 Star
Smokers lungs vs healthy lungs From vine.co 5 Star