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Re: Necks and Brains
Nick Pharris writes;
>Does air enter and exit a bird's respiratory tract through the same opening=
Yep, the mouth [nudge, nudge]. The respiratory track in a bird is based on=
a two-breath cycle (it takes two breath cycles to move one breath of air=
through the system). Air coming from the mouth goes to one set of air=
sacks, then gets pushed through the lungs to another set of air sacks, then=
out the mouth.
"I'm immune to iocane powder."