Injury Alveolitis? the presence of immune cells within the alveolar walls 今 Immune cells > Secrete cvtokines recruiting more immune cells and triggering complex chain of events called“in们 ammation” Cause direct tissue injury Generate oxygen free radicals >Release proteasesInjury Alveolitis?- the presence of immune cells within the alveolar walls Immune cells Secrete cytokines recruiting more immune cells and triggering complex chain of events called ―inflammation‖ Cause direct tissue injury Generate oxygen free radicals Release proteases