Kinetics of appearance of c-Fms⁺ peritoneal cells in regions 1 and 2. At various times after TM injection, peritoneal cells from region 1 (⧫) and region 2 (◊; see Fig 3) were monitored for c-Fms expression by flow cytometry (see the Materials and Methods). Data are expressed as a percentage of the number of cells in the respective region and are the means ± range of variation from 2 experiments (8 mice/time point). A partial kinetic analysis was also performed another 8 times. When error bars are not presented, the errors are smaller than the size of the symbols.