How chickens breathe will astound you! Not in then out like us - but continuously in one direction!

Chickens are not mammals, and they don't breathe like mammals!
The air doesn't go into their lungs then out again, like us. The air flows through their lungs in one direction in a continuous flow!
It's all because of their air sacs - flimsy, non-muscular sacs like a filmy plastic bag. And because of these air sacs:
birds can fly
ducks can float
you should never hold a chicken on her back or upside down
you can't do a Heimlich manoevre on a chicken.
And if they pant a lot in hot weather, chickens can lay eggs with thin shells.

If you liked this video, do check out some fo the others in my playlist about how amazing chickens are:
   • Amazing facts about chickens  

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