Figure 6.
At higher magnifications mitochondria structure in sham-treated tissues (A) generally exhibited intact double membranes with tightly packed lamellar cristae. After the same sham treatment, reperfusion (B) resulted in a large proportion (>80%) of the sections studied, displaying swollen mitochondria with cristae distortion and loss of surrounding membrane. Mitochondria in reperfused myocardium from heat-stressed animals (C) were generally intact with little appearance of the damage seen in the reperfused sham-treated group. *, Examples of swollen mitochondria. Scale bar, 1 μm.