capable of squamous epithelial cell pulmonary alveolar epithelial cell pulmonary alveolar type 1 cell 2010-06-23T04:37:54Z pulmonary alveolar type I cell type 1 pneumocyte type I alveolar epithelial cells membranous pneumocytes A squamous pulmonary alveolar epithelial cell that is flattened and branched. A pulmonary alveolar type 1 cell covers more than 98% of the alveolar surface. This large cell has thin (50-100 nm) cytoplasmic extensions to form the air-blood barrier essential for normal gas exchange. type I alveolar cells ATI AT1 type 1 alveolar epithelial cells BTO:0000780 type I pneumocyte FMA:62500 The marker set AGER can identify the Human cell type pulmonary alveolar type 1 cell in the lung with a confidence of 0.85 (NS-Forest FBeta value). squamous alveolar lining cell lung type 1 cells small alveolar cells squamous alveolar cell respiratory gaseous exchange by respiratory system