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The Process of Inflammation

Healthy LungInflammed Lung

The picture on the left shows a section of healthy lung tissue, the leukocytes (M = macrophages) are all confined to the tissue; (E=endothelial cells), (C=capillary) and (P=pericyte).

The picture on the right shows a section of inflammed lung tissue, the leukocytes (M=macrophages) have migrated to the alveoli and therefore are inhibiting breathing.

(B. H. Wheater PR, Daniels VG, Functional Histology, Churchill Livingstone, Edinburgh, 1979 and B. H. Wheater PR, Stevens A, Lowe JS, Basic Histopathology, Churchill Livingstone, Edinburgh, 1991)