pulmonary surfactant and serve as progenitor cells for replacement and turnover of type I pneumocytes. Pneumocytes in the alveolar wall are very intimately attached to the capillary plexus, and together they form the blood–air barrier
pulmonary surfactant and serve as progenitor cells forreplacement and turnover of type I pneumocytes.Pneumocytes in the alveolar wall are very intimatelyattached to the capillary plexus, and together theyform the blood–air barrier