the point of irreversibility appears to be reached -- so far as time is concerned -- at the end of the first week , after which the injurious effects on the cell are established , since the thin alveolar wall necessary for the exchange of gases becomes overgrown with bulky alveocytes ( tpye ii ) , and the fibroblasts in thealveolar interstitium push the capillaries away from the surface of the alveolus .
C0007634
cell
C0016030
fibroblasts