Figure 1 : CMR as a function of the mass of an animal in-vivo and in-vitro on a log scale plot.

From: Allometric scaling in-vitro

Figure 1

The allometric exponent b is the slope of the line. The cellular metabolic rate increases when cells are removed from the in-vivo context and cultured in-vitro in the laboratory. Theoretical considerations (see text) show that this behaviour is due to high oxygen concentrations and the lack of oxygen gradients in-vitro. Figure adapted from8.