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.
