Assertion: lung | /r/HasAspect | three surfaces
Facets:
Source sentences:
text: Each lung has an apex, base, root, and hilum or hilus of the lung, as well as three surfaces, keeping the lung connected to the sides of the thorax .
text: Each lung also has three surfaces, the costal, the mediastinal and the diaphragmatic, which are of course named after the adjacent anatomical structure which that surface faces.