Cord Blood Stem Cells Information

After splitting Hematopoietic stem cells, how would one change the media? The cells were washed with PBS, cleaved with trypsin, and media was added and the flask was then placed in an incubator. In order to change the media, do you just have to filter/suction out the previous media/solution and add another few ml's of media?

concentration of hematopoietic stem cells? what is the concentration of hematopoietic stem cells in umbilical cord blood?

How do Paralized people make stem cells? If hematopoietic stem cells are found in the bone marrow which is in the hip.What about those who are disjointed from their from the pelvic region and down. That is they don't have that area? Or what if they are paralyzed in the legs?

Can stem cells directly become red blood cells? or for that matter, any kind of blood cells. what are Hematopoietic stem cells in depth. How would a Eukariotic stem cell become a blood cell dirctly? is a blood cell Procariotic? In other ways, i've heard stem cells become cells that create red blood cells? is this in the marrow? please explain!! TY!!