Wandering cells migrate from cultures of human lymph nodes after 2 or 3 hours incubation; they are actively ameboid and phagocytic.
Endothelial cells appear in the plasma clot after 24 to 48 hours incubation. They are relatively inactive and less phagocytic.
Fibroblasts are seen after 48 hours incubation. They are inactive and not phagocytic.
The probable origin of wandering cells from endothelial cells is discussed.