Fig. 15.

Representative transmission electron images of ultra-thin sections of rat lung from different experimental groups showing the air-blood barrier. a. Lung of the control group shows normal air-blood barrier, it is formed of the attenuated cytoplasm of pneumocyte type I (PI), fused basal lamina (arrow) and cytoplasm of capillary endothelial cells (cy) with red blood cell (Rbc). b. Lung of CP group exhibits deformed barrier, swollen cytoplasm of pneumocyte type I (PI), with irregularity in the fused basal lamina (arrow) and swollen cytoplasm of capillary endothelium (cy) with red blood cell (Rbc). c. Lung of ALO recipient group before CP reveals nearly normal barrier; capillary endothelium (cy) with red blood cell (Rbc), fuses basal lamina (arrow) and little swelling in cytoplasm of pneumocyte type I (PI) are observed