Abnormal pulmonary alveolar system morphology Hyaline membranes 2020-12-16T11:36:41Z Hyaline membranes are homogeneous eosinophilic material composed of cellular debris, plasma proteins, and surfactant plastered against alveolar ducts and alveolar walls. The hyaline membranes are deposited along the walls of the alveoli, where gas exchange typically occurs, thereby making gas exchange difficult.