Assertion: lung | /r/Causes | drop
Facets:
value: in the pressure
type: OTHER
value: within the lung
type: LOCATION
Source sentences:
text: Hence, as the thoracic cavity increases in volume the lungs are pulled from all sides to expand, causing a drop in the pressure (a partial vacuum) within the lung itself (but note that this negative pressure is still not as great as the negative pressure within the pleural cavity--otherwise the lungs would pull away from the chest wall).