Template talk:Cahalan
From Embryology
Lymphocyte Migration Speeds
T cells - 10–12 μm/min in the follicle diffuse cortex, peak velocities up to 30 μm/min.
B cells - 6 μm/min in the follicle diffuse cortex, peak velocities up to 20 μm/min.
Both cortical T cells and follicular B cells move in random directions following "guide cells".
Lymphocyte Guide Cells
FDC - Follicular Dendritic Cells, may guide B cells in the follicle.
FRC - Fibroblastic Reticular Cells, may guide T cells in the follicle.