Assertion: alveolus | /r/HasProperty | a air sac
Facets:
Source sentences:
text: The alveolus is a air sac that holds the oxygen.
text: The correct answer is alveolus because the alveolus is the air sac where
text: The alveolus is a air sac that holds the oxygen.
text: An alveolus is a air sac found in the bronchi of the lungs.