What happens in the alveoli in the process of gas exchange

it would be the percentage of food eaten by the flock

i remember doing this lab

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.