Fig. 9.
Histologic sections of thymic lobes treated with inhibitors of motility.
Lobes were treated as in Figure 8, imbedded and stained with hematoxylin and eosin. Magnification is indicated in parentheses. Arrows indicate tracks of lymphoid cells that may represent a route of emigration, and show that in cytochalasin D or Clostridiumtoxin groups, these tracks are relatively empty, whereas in the pertussis toxin-treated group the tracks are relatively congested.
