Assertion: lung's alveoli | /r/HasProperty | the air sacs
Facets:
Source sentences:
text: Alveoli: The air sacs in the lungs where the physiological exchange of gases such as carbon dioxide and oxygen occur
text: Figure B is an enlarged view of the airways, alveoli (air sacs), and capillaries (tiny blood vessels).
text: It helps to keep the alveoli, which are the air sacs where all the oxygen exchange happens, open and inflated.