part of part of has part has part contributes to morphology of pulmonary alveolar type 1 cell lung epithelium epithelium simple squamous epithelium alveolus of lung pulmonary alveolus epithelium epithelium of alveolus BTO:0003511 alveolus epithelial tissue The epithelial layer of the alveoli[MP]. The layer of cells covering the lining of the tiny air sacs at the end of the bronchioles[BTO]. pulmonary alveolus epithelium EMAPA:35121 alveolus epithelium epithelial tissue of alveolus epithelium of pulmonary alveolus MA:0001771 pulmonary alveolar epithelium alveolar epithelium FMA:63915 NCIT:C12867 UBERON:0004821 alveolar wall