From what type of stem cells are all cellular blood components derived?

From what type of stem cells are all cellular blood components derived?

• A. Hematopoietic stem cells
• B. Mesenchymal stem cells
• C. Neural stem cells
• D. Myeloid stem cells

Answer: (A)

Blood cells all come from hematopoietic stem cells in the bone marrow. These stem cells are multipotent and self-renewing, meaning they can produce more of themselves and give rise to all the different blood lineages. From them, two main pathways develop: a myeloid path that leads to red blood cells, platelets, and several white blood cells, and a lymphoid path that produces lymphocytes. Because every blood component ultimately traces back to these hematopoietic stem cells, they’re the correct source. Mesenchymal stem cells form connective tissues, neural stem cells make neural tissue, and myeloid progenitors are downstream lineages that don’t generate all blood components on their own.

Blood cells all come from hematopoietic stem cells in the bone marrow. These stem cells are multipotent and self-renewing, meaning they can produce more of themselves and give rise to all the different blood lineages. From them, two main pathways develop: a myeloid path that leads to red blood cells, platelets, and several white blood cells, and a lymphoid path that produces lymphocytes. Because every blood component ultimately traces back to these hematopoietic stem cells, they’re the correct source. Mesenchymal stem cells form connective tissues, neural stem cells make neural tissue, and myeloid progenitors are downstream lineages that don’t generate all blood components on their own.