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Fig. 2 | Journal of Physiological Anthropology

Fig. 2

From: Telomere elongation protects heart and lung tissue cells from fatal damage in rats exposed to severe hypoxia

Fig. 2

The morphology of rat heart tissues exposed to hypoxia for 1, 3, and 7 days. Control group: myocardial structure was normal, myocardial cells arranged in parallel, the nucleus was located in the center. Hypoxia-1 group: myocardial fiber arrangement was normal, but there were some inflammatory cell infiltration and muscle cell nucleus shrinkage and apoptosis. Hypoxia-3 group: there were mild myocardial fiber arrangement disorder, widened myocardial interstitium, cell edema, loose cytoplasm, rounded nucleus, and increased interstitial blood vessels. Hypoxia-7 group: there were severe myocardial fiber arrangement disorder, severe muscle fiber bundle damage, and large number of muscle cell necrosis; muscle cell boundary was unclear. HE staining (× 400)

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