abnormal alveolocapillary membrane morphology MP:0002324 MPheno.ontology abnormal alveolar-capillary barrier morphology abnormal alveolar-capillary membrane morphology abnormal alveolocapillary barrier morphology abnormal blood-air barrier morphology abnormal blood-gas barrier morphology any structural anomaly of the membrane between the capillary blood and alveolar air, comprised of the alveolar epithelium and the capillary epithelium and their adherent basement membranes and epithelial cell cytoplasm abnormal pulmonary interalveolar septum morphology