Slide D
Pulmonary fibrosis, whole mount with elastic tissue stain: There is diffuse irregularity and some dilatation of the airspaces, and their walls are thickened by fibrous tissue.

Slide E
Diffuse pulmonary fibrosis: These lungs are stiff and firm in consistency. Note the "cobblestoned" appearance of the pleural surface, caused by retraction of the pleura by the interstitial fibrosis.