all formed elements of the blood are derived from a single population of stem cells called
After birth, most production is limited to red bone marrow in specific regions, but some white blood cells are produced in lymphoid tissue. All types of formed elements develop from a single cell type -- stem cell (pleuripotential cells or hemocytoblasts).Seven different cell lines, each controlled by a specific growth factor, develop from the hemocytoblast.hen a stem cell divides, one of the daughters remains a stem cell and the other becomes a precursor cell, either a lymphoid cell or a myeloid cell. These cells continue to mature into various blood cells. A leukemia can develop at any point in cell differentiation.