Mercury in whole blood. Semi-log graph of the mercury (Hg) in whole blood over entire time course of the experiment. Three model prediction lines have been added. The predicted elimination line for 1st order kinetics and zero order elimination were based on the average ke (1st order tem) or k0 (zero order term) for all fish-fed dogs. The third prediction line assumes the elimination of Hg is due to the turnover of red blood cells (estimated at 1% per day).