Assertion: lung | /r/CapableOf | continue to exchange oxygen
Facets:
value: for carbon dioxide
type: PURPOSE
Source sentences:
text: The digestive, circulatory, and respiratory systems all work together, with the digestive system keeping the other two healthy by sending enough nutrients, so the lungs can continue to exchange oxygen for carbon dioxide and the blood vessels can carry this oxygen to the whole body, including the digestive tract.