Human, avian, and insect respiratory systems compared.
<video controls autoplay loop> <source src="https://diqn32j8nouaz.cloudfront.net/breathe_animal_kingdom.mp4" type="video/mp4"> Your browser does not support the video tag. </video>
Previously:
https://www.homemadetools.net/forum/...452#post122472
https://www.homemadetools.net/forum/...459#post212050
https://www.homemadetools.net/forum/...938#post179564
