the point of irreversibility appears to be reached - so far as time is concerned - at the end of the 1st 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 ( type ii ) and the fibroblasts in the alveolar interstitium crowd the capillaries away from the surface of the alveolus .
C0007634
cell
C0016030
fibroblasts