has part has part has_part characteristic of abnormal pulmonary alveolar system morphology diffuse alveolar damage 2021-03-08T10:36:03Z a common histological injury pattern of the lung, whereby the early stages are characterized by epithelial cell necrosis and sloughing, fibrous exudate, edema, and hyaline membranes made of surfactant and proteins, filling the alveoli and resulting in impaired gas exchange; in later stages, alveolar type II cells and myofibroblasts proliferate within the interstitium and airspaces; the corresponding clinical entity is ARDS (acute respiratory distress syndrome) MPheno.ontology MP:0031237 alveolar system