A continuous osmiophilic noncellular membrane at the respiratory surface of the lungs of fetal chickens and of young chicks.
D000818:Animals; D000831:Animals, Newborn; D002197:Capillary Action; D002642:Chick Embryo; D003593:Cytoplasm; D004848:Epithelium; D008168:Lung / Q000166:cytology / Q000196:embryology*; D008566:Membranes; D008854:Microscopy, Electron