Submitted by LemmeKermitSuicide t3_z8ssc4 in askscience
dan_dares t1_iye4so7 wrote
Reply to comment by _AlreadyTaken_ in How is O2 introduced to blood in the alveoli? by LemmeKermitSuicide
Yep the inherent limitation of spiracles..
But the alternative is 8 foot tall insects, so i'll take that.
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