Figure 3. Photomicrography of the lung. A - Alveolar hemorrhage (H&E, 100X); B - Pulmonary parenchyma with edema and extravasated erythrocytes (H&E, 100X); C - Pulmonary emphysema, represented by distended alveolar spaces and rupture of the alveolar septa (H&E, 100X); D - Area of pulmonary honeycombing, with alveoli lined by bronchial epithelium, plus the presence of alveolar hemorrhage (H&E, 100X).
