The structure of typeI, IIalveolar cells and pulmonary alveolar capillary endothelial were maintained normal.
型肺泡上皮细胞形态完整，数目增多，板层小体结构趋于正常。
2
The typeI and type II alveolarcells appeared swollen, vacuolated and broken with the blood air barrier severely damaged and surfactants significantly decreased.