“A dissection of a sheep pluck, showing the relative positions of the trachea, lungs and heart. This dissection focuses on the function of the breathing system.” (YouTube)
Another excellent demonstration by ScienceDemo.org and Alom Shaha. It’s clearly explained, detailing the structure and therefore the function of the sheep pluck, as well as giving hints and tips on how to demo this yourself to a class.
Superb stuff. Onwards!
Richer Ramblings 
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