The most primitive stem cells (hemocytoblasts) give birth to two types of precursors: the lymphoid and myeloid stem cells. These, by dividing several times in turn, produce the white blood cells, the red blood cells and the platelets.
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Caption:
The most primitive stem cells (hemocytoblasts) give birth to two types of precursors: the lymphoid and myeloid stem cells. These, by dividing several times in turn, produce the white blood cells, the red blood cells and the platelets.