all formed elements of the blood are derived from
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.ll 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.