the images obtained give a dynamic aspect of the changes in the lesions with two distinct phases : a phase of reactivity at 48 hours , marked by the development of hyperactivity of the granular pneumocytes , a phase of destruction characterised by considerable changes in the alveolar epithelium and filling in of the alveolar lumen with various debris .
C0225700
granular pneumocytes
C0225694
alveolar epithelium