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In this video, learn about how humans breathe with their lungs ... the alveoli and gets breathed out into the air. Wheee! I think I could use some exercise myself. Stand back kids, let me show ...
In this video, learn about how humans breathe with their lungs ... the alveoli and gets breathed out into the air. Wheee! I think I could use some exercise myself. Stand back kids, let me show ...
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