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All formed elements arise from stem cells of the red bone marrow. Recall that stem cells undergo mitosis plus cytokinesis (cellular division) to give rise to new daughter cells: One of these remains a stem cell and the other differentiates into one of any number of diverse cell types.
Pluripotent Stem Cells. Parent Cell that gives rise to all of the formed elements of the blood. Stem cell must differentiate before it can make the formed elements. Only found in Red Bone Marr containing all the DNA necessary to create ALL of the formed elements.) when blood vessel is damaged collagen fibers are exposed. 2)Collagen is a platelet magnet. 3) As the plug grows it helps slow down/stop the blood loss. 4) Platelet plug only temp (cut-finger & re-bleeds) 5) It will release chemicals (when formed) which help maintain spasm.