Figure 1. Systemic changes during and following chronic hypoxia in the young and old F344 rats.
A, Increase in hematocrit following three weeks of chronic hypoxic exposure as a function of age. B, Body weight change during three week chronic hypoxic exposure as a function of age. Each value represents the mean +/− SD from at least three rats. *p < 0.05 compared with control (non-hypoxic) blood samples.