Summary of key parameters determining oxygen uptake in the lungs in mole rats (hatched bars) compared with white rats (open bars). VL/Mb, lung volume related to body mass; S(a)/Mb, body mass-specific alveolar surface area; S(c)/Mb, capillary surface area relative to body mass; and DlO2/Mb, body mass-specific pulmonary diffusing capacity for oxygen. Data are reported as mean ± SEM. ∗, Significantly different vs. white rat, P < 0.05.