the process by which all blood cells are formed is called
The formed elements contain blood cells and platelets. In the adult, the formed elements are produced continuously in the red bone marrow of the skull, ribs, and vertebrae, the iliac crests, and the ends of long bones.The process by which formed elements are made is called hematopoiesis (Fig.11.2) .tem cells in red bone marrow produce cells that mature into the various types of formed elements. At the top of Figure 11.2 is a multipotent stem cell that divides, producing two other types of stem cells.