Normalized concentration of labeled cells in blood, efferent subcutaneous lymph, and efferent intestinal lymph after intravenous injection. Figure 1 depicts the distribution of labeled PBLs (A), subcutaneous ELLs (B), and intestinal ELLs (C) in blood, efferent subcutaneous lymph, and efferent intestinal lymph after reinjection. The absolute concentration of labeled cells in each tissue at each time point was divided by the number of cells injected and then multiplied by 10⁹ to give a percentage of labeled cells/10⁹ injected at each point. The results were then pooled between all experimental animals (labeled PBLs, n = 6; labeled subcutaneous ELLs, n = 3; labeled intestinal ELLs, n = 3; all values ± SEM).