1. Organ:Lung
Lesion. The color of the affected part is dark red or congested .
Diagnosis: active hyperemia

2. Organ:Liver
lesion:characterized by congestion of the blood vessels in portal area besides inflammatory cells. H&E.
Diagnosis: active hyperemia

3. Organ:Liver
Lesion represented by congested blood vessels with absence of inflammatory cells.
Diagnosis: acute venous congestion

4. Organ:Lung
Lesion: The pulmonary capillaries are congested beside pale eosinophilic transudate in the alveoli. H&E
Diagnosis: chronic venous congestion

5. Organ:Liver
Lesion showing hemorrhage represented by replacement of hepatocytes with extravasated erythrocytes. H&E.
Diagnosis:hemorrhage.

6. Organ:Heart
Lesion: Gross, coronary thrombosis in coronary blood vessels.
Diagnosis: thrombosis.

7. Organ:Lung
Lesion: Micro, recent thrombosis composed of fibrin, blood platelets, erythrocytes and leukocytes. Moreover, the thrombus attached to one side. H&E.
Diagnosis:Thrombosis.

8. Liver portal vein showing parasitic emboli (Schistosoma mansoni adult worm), H&E.

9. Organ:Kidney
lesion showing pale area represented by necrosis of renal parenchyma which infiltrated with inflammatory cells.
Diagnosis:infarction.

10. Heart showing pale infarction