When we breathe in, our lungs take in air, but when we breathe out, they also release carbon dioxide.
(we; breathe; in) (our lungs; take; T:When we breathe in) (we; breathe out; ) (they; also release; carbon dioxide; T:when we breathe out)
we our lungs we they
breathe take breathe out also release
in
T:When we breathe in
carbon dioxide T:when we breathe out