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Question Video: Recalling the Organ where White Blood Cells Originate Biology

Where do all white blood cells originate?

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Video Transcript

Where do all white blood cells originate?

The question is asking us where in the body white blood cells come from. White blood cells have a variety of roles in the immune system, including engulfing and digesting harmful pathogens and producing antibodies. You may be familiar with the fact that all white blood cells and red blood cells develop from stem cells. Hematopoietic stem cells can differentiate to form all types of blood cells. Hematopoietic stem cells are found in the red bone morrow. These differentiate to form the many different types of white blood cells, including different types of lymphocytes and a range of phagocytic cells. The B lymphocytes remain in the bone marrow to mature, while the T lymphocytes migrate from the bone marrow to the thymus gland to complete their maturation. All other white blood cells, for example, the phagocytic cells, macrophages, and neutrophils, also develop from hematopoietic stem cells in the red bone marrow.

So the answer to the question “Where do all white blood cells originate?” is bone morrow.

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