Breathing Flashcards by Reigui Kookiemonkey

Q

Lungs filled with millions of tiny, thin-walled air sacs called _

A

Alveoli

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Q

Blood vessels surround each alveoli sac, allowing gases to _

A

Diffuse into and out of bloodstream

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Q

Hummingbirds take about _ breaths per minute

A

250

(Humans 12)

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