21,468 views
40 votes
40 votes
HELP
HELP
HELP
I
NEED
THIS
HURRY

HELP HELP HELP I NEED THIS HURRY-example-1
User Evelise
by
3.1k points

1 Answer

17 votes
17 votes

Answer:

oxygen in and carbon dioxide out

User GNerb
by
3.5k points